How does this branch differ from other Vaishnava religions like Madhva Vaishnavas and Gaudiya vaishnavas?
It is to be noted that Advaita, Dvaita etc., are personal opinions of individuals and they do not explain the entire Veda, Geeta and Brahma Sutras (Prastaana Trayam). Many of these are not only against the Veda but also against logic and rationality. Only Visistadvaita Shree Vaishnavam is the purport of Veda, Geeta and Brahma Sutras.