R9 270X Vs. Radeon 7870

I hear that both graphic cards are almost the same thing. I need to choose one but don't know which one too pick. 

They are the exact same card with different names.

The only difference is that the R9-270x it is roughly 10% faster. If you compare the two cards you"re probably going to see the 270x get like 2 frames more than a regular 7870.