Being a current nexus one and iPhone user I can say that the touch screen on the iPhone is better. The Nexus One touch screen still has bugs in it. Example, I will touch a button and a button next to it will be clicked. But this may be to blame on software related issues. Also when the line test is done on both the nexus One's lines step and the iPhones's lines don't. The better the touchscreen the fewer the steps when drawing diagonal lines. The Screen on the Nexus One is sharper, but there aren't or probably will be any games that take advantage if it. I just wish the game development community was as refined on android as it was on the Apple App Store.