Diamond vs. Diamond Pro vs. TyTn

I currently have a HTC TyTn and was thinking of getting either the new HTC Diamond or the HTC Diamond Pro and was not sure how they stack up size wise; but that is there sizeasy.com come in the picture and help me see what the three of them look like together .

Diamond Pro is a little thinner and lighter than the TyTn, the question for me is do I really need the keyboard or can I live with something like the Diamond. Hmm … decisions, decisions, decisions.