When Krishna appears in Vrndavana in the material creation, then that form of Krishna is His Vishnu tattva expansion playing the part AS Krishna.
However, the Balarama in Vrndavana in the Spiritual World is already a Vishnu tattva expansion of Krishna, so when that Balarama appears in the facsimile Vrindavana in the material creation, He expands Himself as the exact same Balarama and appears in the material creation while simultaneously remaining in the Vrindavana in the Spiritual world with Krishna.
Srila Prabhupada - ''Krsna is the original Supreme Personality of Godhead, and Baladeva is Krsnaimmediate expansion. Both Lord Krsna and Baladeva appeared as sons of Vasudeva, so both of Them may be called Vāsudeva. From another point of view, because Krsna never leaves Vrndavana, all the forms of Krsnathat appear elsewhere are His expansions''. (Bhagavad Gita As It Is Chapter 10 Text 37)
Srila Prabhupada - ''Lord Krsna in Dvārakā is the Vasudeva expansion of the original group. The original Lord Krsna never leaves Goloka Vrindāvana. All the plenary expansions are one and the same visnu-tattva, and there is no difference in Their potency''. (Srimad Bhagavatam Canto 3 Chapter 1 Text 34)
Srila Prabhupada - ''Adi-caturbhuja, the original expansions from Baladeva, are Vāsudeva, Sankarsana, Pradyumna and Aniruddha. All of Them are visnu tattvas, or nondifferent Personalities of Godhead''. (Bhagavad Gita As It Is Chapter 10 Text 37)
We are krishna's

© we are krishna's