I would not choose the XFX just for 5MHz more core speed, but if you really want the games then that may be how you want to go. If you are more concerned about clockspeed, then maybe the suped up 7800GT CO from eVGA might be more your style.
Personally, If the eVGA and XFX were the same price, I'd likely go with XFX *if* I wanted the games. However, I really like eVGA because you are allowed to overclock and install custom coolers without voiding the lifetime warranty.
I forget what type of warranty XFX has, but eVGA's is tough to beat.
Intel Core i7-3960X, GIGABYTE G1.Assassin 2, Kingston 16GB DDR3-2133, NVIDIA GeForce GTX 770 2GB
Kingston HyperX 3K 240GB SSD (OS, Apps), WD VR 1TB (Games), Corsair 1000HX, Corsair H70 Cooler
Corsair 800D, Dell 2408WFP 24", ASUS Xonar Essence STX, Gentoo (KDE 4.11. 3.12 Kernel)
"Take care to get what you like, or you will be forced to like what you get!" - H.P. Baxxter
<Toad772> I don't always drink alcohol, but when I do, I take it too far.