In the standard Vaishnava account Vishnu is the supreme form and Krishna one of his descents. Gaudiya Vaishnavism, following Chaitanya and the six Goswamis of Vrindavan, reverses it: Krishna is svayam bhagavan, God in his own person, and Vishnu is his expansion. This is not a technicality — it decides which name is chanted, which form is installed in the temple, and what the goal of practice is. ISKCON states it in the first pages of Bhagavad-gita As It Is, which is why some Hindus find the movement's presentation of Hinduism narrow, and why Gaudiya Vaishnavas find it exactly right.