Here was a Lost Planet (DX9, XP) run between an OC'd XT (875|975) and a stock GTX. Both cards were ran w/ the same in-game settings:

Mine (80FPS):
http://www.nvnews.net/vbulletin/show...&postcount=658

Sammy Sung (89FPS):
http://www.nvnews.net/vbulletin/show...&postcount=661


Lost Planet runs the same on the Alphas (8.37.4.2) as it does the 8.38s, from my experience, with no visible IQ difference between the two.