Namaste all.

I practice gaudiya-vaishnava but at the same time I feel very attracted to Patanjali's raja-yoga.
I am reading the following book:
http://www.ibs.it/libro+inglese/brya...865477360.html

My question is the following:is ultimate raja-yoga's samadhi necessarly advaita or can it be dualistic and so compatible with my dualistic vaishnava path?

Pranama,
Orlando.