In early May 2008, HTC unveiled two new flagship products, HTC Touch Diamond and HTC Touch Pro.

Their common features are listed as follows:
- 2.8-inch touch screen, 640×480 pixels.
- Vibrant TouchFLO 3D user interface, responding perfectly to your finger gestures when scrolling through contacts, browsing the web, and launching media… all vividly displayed as photos and artwork powered by the 3D graphics processor.
- HTC Weather – providing a constant view of weather at home and abroad.
- Surf and download at broadband speed with HSDPA internet connectivity and Wi-Fi (IEEE 802.11 b/g).
- 3.2 megapixel auto-focus camera for quality stills and video.
- Integrated GPS for use with maps software for a full turn-by-turn satellite navigation experience.
By looking at their outlooks, it is obvious that Pro has a full-size QWERTY keyboard. Diamond has a software QWERTY keyboard since its screen is also a touch interface. Pro is 0.71 inches thick and Diamond is only 0.45 inches thick. Also, Pro is 5.83 oz and Diamond is 3.88 oz. Pro is thicker and heavier than Diamond, again, because of its full-size QWERTY keyboard. Depends on your preference, I personally prefer thinner and lighter gadget.
Other features are fairly similar as listed above. Except Diamond has 4GB of internal memory out-of-box, while Pro has only 512MB only! However, Pro has GSM 850/900/1800/1900 MHz bands (Quad band) while Diamond has only 900/1800/1900 MHz (Tri band). I am still using my two-year-old Moto K1 (Quad band). Comparing with my old SE phone (I don’t remember the model but it was only a tri band), the 850 MHz band really make a different in North Ameria, at least in Canada.
From their name, Pro has more value-added features, such as 850 MHz band and longer battery life. Diamond aims for the entertainment-rich features, such larger memory for music/movie download.
Looking at Sony Ericsson XPERIA X1, it is very comparible to Pro. In fact, they both have full-size QWERTY keyboard, they are both running MS Windows Mobile 6.1, they are both quad band compatible and Wi-Fi support. However, X1 is a stonger one comparing to Pro. X1 has a 3 inches WVGA (800×480, 64k-colour TFT) and lighter (5.1 oz).

Both X1 and Pro will be released late summer in 2008. It is going to be a head-to-head competition! Stay tune!
(Pictures credit: HTC & Sony Ericsson)