Krsna is the Supreme "Person" and the cause of all causes.

God (Krsna) is not only an all-pervading consciousness or the impersonal Brahmajyoti, no, Krsna (God) is also simultaneously the Supreme individual "PERSON," as an eternal bodily Form.

Only Krsna has 64 qualities in full because He is the original Supreme Personality of Godhead and cause of all causes.

From Kṛṣṇa’s first expansion, Balarama, do all Visnu-tattva expansions manifest. Kṛṣṇa as His original form never leaves Vṛndāvana. All of Krsna’s pastimes in the material creation are carried out by Balarama's Visnu-tattva expansions.

The Visnu-tattva (Visnu/Narayana) expansions of Krsna, who are also God, have only 60 of Krsna's 64 attributes or 93.75% of Krsna's qualities.

The word "Hindu" is not found in Vedic texts because it is an alien word introduced by European and Islamic invaders to the Indian sub-continent around 2,500 to 1,500 years ago. 

Krsna is not an expansion of Visnu as many Hindus wrongly believe today. Krsna in Vrindavan is the original form of God not Visnu.

The fact is Krsna is the original Supreme Personality of Godhead and cause of all causes from who all Visnu forms originate from.

The 4 qualities or attributes Visnu or Narayana do not have in full are as follows-

(1) Krsna is the performer of wonderful varieties of pastimes (especially His childhood pastimes)

(2) Krsna is surrounded by devotees endowed with wonderful love of Godhead.

(3) Krsna can attract all living entities all over the universes by playing on His flute.

(4) Krsna has a wonderful excellence of beauty which can not be rivalled anywhere in the creation.

These four qualities out of Krsna's 64 attributes are important to understand because, as said, not even Visnu/Narayana forms of God have them in full, only sometimes exhibited partially.

All expansions of Krsna are His "sakti energies."

Srila Prabhupada - "Sakti means the energy of Krsna." (SB, Canto 4 Ch 6 text 43)

1 - Visnu-tattva expansions have 60 qualities out of Krsna's 64 attributes which is 93.75 of Krsna's 100% qualities.

2 - Other sakti-tattva categories are Kṛṣṇa's internal potency or energy representing headed by Srimati Radharani who is Krsna's direct and intimate expansion. 

When Kṛṣṇa wanted to experience loving exchanges with a women He created Srimati Radharani.

3 - Siva-tattva have 55 qualities of Krsna's 64 qualities which is 84.375% of Krsna's 100% qualities.

4 - Jiva-tattva (jiva-souls) have 50 qualities of Krsna's 64 qualities, which is 78.125% of Krsna's 100% qualities.

The difference between Krsna (64 qualities) and Visnu/Narayana (60 qualities) are the four extra qualities that only Krsna has in full.

The full extent of Krsna's wonderful qualities or attributes is inconceivable.

Here are Krsna's 64 qualities or attributes-

(1) Beautiful features of the entire body.

(2) Marked with all auspicious characteristics.

(3) Extremely pleasing.

(4) Effulgent.

(5) Strong.

(6) Ever youthful.

(7) Wonderful linguist.

(8) Truthful.

(9) Talks pleasingly.

(10) Fluent.

(11) Highly learned.

(12) Highly intelligent.

(13) Genius.

(14) Artistic.

(15) Extremely clever.

(16) Expert.

(17) Grateful.

(18) Firmly determined.

(19) An expert judge of time and circumstances.

(20) Sees and speaks on the authority of Vedas (scriptures)

(21) Pure.

(22) Self-controlled.

(23) Steadfast.

(24) Forbearing.

(25) Forgiving.

(26) Grave.

(27) Self-satisfied.

(28) Possessing equilibrium.

(29) Magnanimous.

(30) Religious.

(31) Heroic.

(32) Compassionate.

(33) Respectful.

(34) Gentle.

(35) Liberal.

(36) Shy.

(37) The protector of surrendered souls.

(38) Happy.

(39) The well-wisher of devotees.

(40) Controlled by love.

(41) all-auspicious.

(42) Most powerful.

(43) all-famous.

(44) Popular.

(45) Partial to devotees.

(46) Very attractive to all women.

(47) all-worship able.

(48) all-opulent.

(49) all-honourable.

(50) The supreme controller.

(51) Changeless.

(52) all-cognizant.

(53) Ever fresh. 

(54) sat-cit-ananda-vigraha which means eternity, knowledge, bliss and form. Kṛṣṇa (God) always expresses Him as both an all-pervasive energy, and as an eternal PERSON.

(55) Possessing all mystic perfections.

(56) He has inconceivable potency.

(57) Uncountable universes generate from His body.

(58) He is the original source of all incarnations.

(59) He is the giver of salvation to the enemies whom He kills.

(60) He is the attractor of liberated souls.

As explained  above, besides these sixty transcendental qualities, Krsna has four more not manifested even in the Visnu/Narayana form of Godhead, what to speak of the demigods or living entities which are-

(61) He is the performer of wonderful varieties of pastimes (especially His childhood pastimes).

(62) He is surrounded by devotees endowed with wonderful love of Godhead.

(63) He can attract all living entities all over the universes by playing on His flute.

(64) He has a wonderful excellence of beauty that can not be rivalled anywhere in the creation.

The Absolute Truth Lord Krsna is anandamaya (desiring to increase His joy), hence, from Krsna's original form, He expands and becomes many.

These emanations from the Supreme Person are of two categories: full expansions and partially manifested expansions.

The Lord's various full and partial expansions and the Lord Himself simultaneously co-exist, only appearing to manifest under the influence of time.

These expansions of Krsna are known as Visnu-tattva Forms of God, and they are also the Supreme Absolute Truth such as-

Balarama, 

Vāsudeva, 

Saṅkarṣaṇa, 

Pradyumna, 

Aniruddha

Ramachandra, 

Narsingadeva,  

Narayana, 

Visnu,

Maha-Visnu, 

Garbhodakashayi Visnu, 

Paramatma,  etc.

And then there is Radharani and many other inhabitants including many gopis and gopas who are technically Radha and Krsna (Visnu-tattva) playing different roles in Their own Vrindavana pastimes alongside the jiva-souls.

All Visnu-tattvas and other sakti-tattvas like Srimati Radharani accept their own role in the mood of Servitor to the "original" Supreme Being Lord Krsna.

For example, Visnu and Narayana Forms are known by many different names on their particular Vaikuntha Planet in the Spiritual sky.

This relationship is the foundation of Vedic monotheism, which encompasses the inconceivable, absolute personal nature of the original Godhead.

As explained above, Lord Krsna possesses two other expansive qualities known as Siva-tattva and jiva-tattva (jiva-souls). 

Together with Visnu-tattva and the intimate "sakti"-tattva forms (mostly Visnu-tattva), these four personalities are representative of the Absolute Person's (Krsna's) internal, external, and marginal energies.

The Lord expands Himself as Lord Siva and Lord Brahma, and the marginal living entities (jiva-souls) are also expansions.

Like us, Lord Brahma is also jiva-tattva or jiva-soul (78.125%)

Lord Siva is between Visnu-tattva and jiva-tattva (84.375%)

Lord Visnu/Narayana is Visnu-tattva (93.75%)

Kṛṣṇa's internal potency or energy is headed by Srimati Radharani who is Krsna's direct  and intimate expansion. 

When Krsna desired to experience loving affection and exchanges with a woman, He expanded Himself as Srimati Radharani, who is none different than Krsna.

Visnu-tattva and jiva-tattva are different categories of living entities, the first is a direct expansion, the second is a separated expansion, but are all both expansions of the Supreme Personality of Godhead Lord Krsna.

Therefore, as a reminder, we can summarize as follows-

Lord Krsna has all His 64 qualities (100%)

Visnu-tattva direct expansions has 60 qualities of Krsna's 64 attributes (93.75%)

Siva-tattva has 55 qualities of Krsna's 64 attributes (84.375%)

Jiva-tattva (jiva-souls) separate expansions has 50 qualities of Krsna's 64 attributes (78.125%)

This is the reason why Krsna is called Param Purushottam, Purnavatar or Supreme Personality of Godhead and cause of all causes. 

Srila Prabhupada - "Learned scholars in transcendental subjects have carefully analyzed the summum bonum Krsna to have sixty-four principal attributes. All the expansions or categories of the Lord possess only some percentages of these attributes. But Sri Krsna is the possessor of the attributes cent percent. His personal expansions such as svayam-prakasa, tad-ekatma up to the categories of the avataras who are all visnu-tattva possess up to 93.75% of these transcendental attributes." (SB, Canto 1 Ch 3 Text 29)

93.75% means all Viṣṇu/Narayana expansions have 60 of Krsna's 64 qualities.

Lord Siva is neither Visnu-tattva or jiva-tattva, he is in a league of his own and possesses 85.938% of Krsna's attributes which is having 55 of Krsna's 64 qualities.

The jiva-souls or the individual marginal living entities, possess up to the limit of 78.125% of Krsns's attributes which is having 50 of Krsna's 64 qualities.

The jiva-souls can never be Krsna, Visnu or Siva but can become a Brahma in due course with the build up of pious activities. 

Lord Siva is Kṛṣṇa's greatest devotee in a mysterious category of his own. Siva is not Visnu-tattva (God) or jiva-tattva He is Siva-tattva and has 85.938% of Krsna's qualities, which means he has 55 of Krsna's 64 qualities. 

In the conditioned state of material existence, the marginal living entities (jiva-souls) exhibit up to 50 of Krsna's 64 attributes in very minute quantity in the material creation, varying in terms of the pious and impious life of the living being.

Only in the spiritual world are the jiva-soul's full potential fully experienced.

The most perfect of living beings in this material universe is Brahma, the supreme administrator of each material universe deep inside their surrounding Brahmanda greater universe.

Lord Brahma, who is also jiva-tattva, possesses 78.125% per cent of Krsna's 100% attributes, he cannot possess anymore than.

All the demigods except Siva have only 78.125% attributes or have 50 of Krsna's 64 qualities also. 

All jiva-souls trapped in the 8 million 400 thousand species of material life, also possess these same attributes in their full potential in the spiritual world but presently covered by material energy.

The standard of perfection for a human form of life is to realize their full potential as the jiva-soul within the material body that has of 78.125% of Krsna's quantities. 

The marginal living entities or jiva-souls can never possess attributes like Siva, Visnu, Radharani, Balarama or Lord Krsna.

The marginal living entities (jiva-souls) can become godly by developing their full potential of 78.125% of Krsna's qualities however, they can never become a God like Krsna or Visnu (93.75%), or a Siva (Siva-tattva) who has 85.938% of Krsns's qualities.

Although the jiva-souls can become a Lord Brahma in due course.

The godly living beings who are all residents of the Vaikuntha planets in the spiritual sky are eternal associates of Visnu in different spiritual planets called Hari-dhama and Mahesa-dhama.

However, the abode of Lord Krsna Goloka-Vrindavana is above all the Vaikuntha planets and is called Krsnaloka or Goloka Vrndavana.

The marginal living entity (jiva-soul) can develop 78.125% of the above attributes in full, which is their full potential; they can never become Krsna or Visnu.

By reaching their full potential of 78.125%, the jiva-souls can again enter the planet of Krsna-loka (Goloka-Vrindavana) or the Vaikuntha planets after leaving their present decaying material bodily vessel in the material creation.***.