sei - that; nārāyaṇa - Lord Nārāyaṇa; kṛṣṇera - of Lord Kṛṣṇa; svarūpa - original form; abheda - not different; eka-i - one; vigraha - identity; kintu - but; ākāra - of bodily features; vibheda - difference.

Nārāyaṇa and Śrī Kṛṣṇa are the same Personality of Godhead, but although They are identical, Their bodily features are different.