The Asus P565 is powered by an 800MHz Marvell processor and in the video below, you can see just how fast this processor can go. Asus just released this clip to show you exactly how much faster 800MHz can pump along the data compared to a suitable competitor. I can't say for sure, but I think that's an HTC Touch Diamond on the left.
Whereas the Asus P565 rocks an 800MHz processor, the HTC Touch Pro only has a 528MHz processor, as does the Sony Ericsson Xperia X1.