HTC Mobile Phones Comparison

Engadget is pitting brother against brother in their short note regarding the HTC s740, the Touch Pro, and the Touch Diamond. the s740 is a lovely device - now why can't they make ones this sleek with a touch screen yet? The size of the components was an issue years ago - shouldn't that have been resolved by now. In my mind, the Touch Pro should have the same dimensions (albeit with larger screen) as the s740.