Both the Samsung Galaxy S and HTC Desire are powered by a 1GHz CPU but the Galaxy S uses a Hummingbird CPU while the Desire uses a Snapdragon CPU.
Watch the video below to see how the Samsung Hummingbird chip wins over the HTC Desire.
httpv://www.youtube.com/watch?v=dpP5QljEqow&feature=player_embedded
Here is a video of Galaxy S running Quake 3
httpv://www.youtube.com/watch?v=oaaicSzzHeE&feature=player_embedded
via SamsungHub