Well like I said it is purely a matter of preference. The bigger screen on the Omnia is nice but once you compare it side by side to the TP , you'll never be happy with the Omnias resolution again, lol.
The Omnias chipset is faster at 624MHz but I didnt notice a significant difference. I did also see the first Omnia i910 custom released which is exciting but the Omnia will NEVER have as many to choose from as the Touch Pro already has
I would say that is where the Omnia exceeds the Touch Pro is it's muntimedia capabilities , and the Touch Pro is more business driven.