At least as far as gaming goes it appears that the Hummingbird processor that powers phones like the Galaxy S, outclasses the Snapdragon processor powered phones like the Desire, EVO, etc..
Link: http://www.phonearena.com/htmls/HTC-Desire---Samsung-Galaxy-S-square-off-in-a-Quake-2-death-match-article-a_12265.html
Link: http://www.phonearena.com/htmls/HTC-Desire---Samsung-Galaxy-S-square-off-in-a-Quake-2-death-match-article-a_12265.html