R9 270X vs AMD Sapphire Radeon 7950 OC Vapor-X

Hardware Hub GPU
1

Can someone tell me the difference between the 2 GPU's? 

2

270x = 7870 GHz

7950 > R9 270x

3

A 270x is a rebranded 7870. With all of the new modifications to it they will probably perform very similarly with the 7950 being a few frames ahead,

4

Thanks.