As a baseline, presented is the stock (unlocked, GSM) HTC Touch Pro2 straight from HTC. This is how the device was originally drawn out by the designers at HTC.

FRONT- As you can see, there is a small ‘HTC’ logo centered on the top of the device for the front, along with the screen and the chrome sides.

BACK- On the back, there is silver text that says ‘HTC Touch Pro2’ on the brushed aluminum back and a white outer surrounding edge.

KEYBOARD- For the slide-out keyboard, there are silver keys on a brushed aluminum backing. Standard QWERTY keyboard.

T-Mobile Touch Pro2

FRONT- For the front of the device, T-Mobile has the now ubiquitous Carrier branding on the left upper side and the HTC logo on the right. For the sides, T-Mobile has opted to use a graphite-like pastel.

KEYBOARD- T-Mobile has moved away from the silver and white mixture that HTC used and has black keys on a dark gray backing, with silver sides.

BACK- For the back of the device, T-Mobile has had their own battery cover designed. There is a dark silver speaker grate with a bright silver design around the Camera Lens and Speaker phone button, with text stating ‘3.2 Mega Pixel’. On the upper half, there is a black box. At the bottom there is a Fav 5 image.

AT&T TILT 2 (Touch Pro2)

FRONT- From what can be gleaned from the above image, the AT&T model has a chrome outer housing with the standard screen. If you look closely, you will be able to see a AT&T branding logo on the upper right of the device and the HTC logo on the upper left.

*Interesting tidbit- Based on the image above, it is sporting WM 6.5, unlike any other carrier device, which have all been seen running WM 6.1. It appears to be the lock screen for WM 6.5.

KEYBOARD- AT&T has gone with white keys set against a black backplate, but unlike the other 3 U.S. carriers, has gone without a dedicated number pad, instead opting for a numeric keypad and blue Fn keys.

BACK- Without any images surfacing of the back battery cover for the AT&T Tilt 2, we can only guess at what it will look like. This post will be updated as soon as more information becomes available.

Verizon Touch Pro2

FRONT- Verizon has placed their well-known logo front and center at the top, and towards the bottom, below the Zoom Bar, sits the HTC logo. Everything is swathed in a black fashion.

KEYBOARD- Standard black keys on a light gray back plate and black sides. Completely opposite of the unlocked HTC device.

BACK- The outer half of the device is a matte silver and the inner half of the battery cover lies a speaker grate with lots of little holes running from the camera lens to almost the bottom. Right below the Speaker phone button, there is ‘3.2’ text in silver and mid way lies another, smaller, HTC logo. On the bottom half of the black speaker grate there lies a Map of the World (alluding to the fact that this device is a world phone).

SPRINT TOUCH PRO2

FRONT- Upper left there is a Sprint logo and across from it there is a HTC logo. The sides are crafted in a gray shade.

KEYBOARD- For the keyboard, Sprint has opted for black keys on a dark gray backing, with black sides.

BACK- By far the most far reaching redesign, Sprint has opted for a brownish covering. Center and towards the bottom, there is a HTC logo, midway and towards away from the volume rockers is ‘3.2 Mega Pixel’. What I can only describe as a reverse block cut out design envelops the upper half of the battery cover. It goes around the Camera Lens/ Speaker Button, and tapers down to the bottom of the cover.

Hardware differences-

Hardware wise, there are 3 major differences (besides exterior components) to be found.

Cellular Technology supported-

The Sprint and Verizon models are CDMA and the T-Mobile/AT&T are GSM. Verizon/Sprint both offer EVDO Rev A support while T-Mobile and AT&T have support for their HSPA 3G services. Also, Sprint/Verizon have decided to offer their phones with Quadband GSM support, meaning that these devices can be used worldwide using a SIM card.

3.5 MM Headphone Jack-

Second major difference is that both Sprint and Verizon have included a 3.5 MM headphone jack while T-Mobile has omitted this feature. This allows any user to plug in their favorite pair of headphones while any T-Mobile user has to use the included USB dongle to use a 3.5 MM set of headphones. The AT&T device is currently unknown if in possession of a 3.5 MM Headphone jack.

CPU/Other-

Any user of a Touch Pro or Diamond will feel right at home when it comes to hardware muscle. All carrier branded phones have made no major chipset-wise upgrades. The GSM models (T-Mobile/AT&T) have the well-known Qualcomm® MSM7200A CPU, clocked at 528 MHz. The CDMA models (Sprint/Verizon) have upgraded to the Qualcomm® MSM7600 chipset. Other than the inclusion of Quadband GSM support, this appears to be the same basic CPU used in the CDMA Touch Pro and Diamond, as the clock speed of 528 MHz is the same.

Other than the above mentioned differences, the following specs are the same for all 3 devices.

Model	HTC Touch Pro2 (T7373)
Operating System	Windows Mobile® 6.1 Professional
Memory	ROM: 512 MB RAM: 288 MB
Dimensions(LxWxT)	116 X 59.2 X 16.65 mm (4.57 X 2.33 X 0.66 inches)
Weight	178.5 grams (6.3 ounces) with battery
Display	3.6-inch TFT-LCD touch-sensitive screen with 480 X 800 WVGA resolution Adjustable tilt screen
Network	HSPA/WCDMA: Europe/Asia: 900/2100 MHz Up to 2 Mbps up-link and 7.2 Mbps down-link speeds Quad-band GSM/GPRS/EDGE: Europe/Asia: 850/900/1800/1900 MHz (Band frequency, HSPA availability, and data speed are operator dependent.)
Device Control	TouchFLO 3D Zoom bar
Keyboard	Slide-out 5-row QWERTY keyboard
GPS	Internal GPS antenna
Connectivity	Bluetooth® 2.1 with Enhanced Data Rate and A2DP for wireless stereo headsets Wi-Fi®: IEEE 802.11 b/g HTC ExtUSB (11-pin mini-USB 2.0, audio jack, and TV Out* in one)
Camera	Main camera: 3.2 megapixel color camera with auto focus Second camera: VGA CMOS color camera
Audio supported formats	AAC, AAC+, eAAC+, AMR-NB, AMR-WB, QCP, MP3, WMA, WAV, MIDI, M4A
Video supported formats	WMV, ASF, MP4, 3GP, 3G2, M4V, AVI
Battery	Rechargeable Lithium-ion battery Capacity: 1500 mAh Talk time: Up to 390 minutes for WCDMA Up to 510 minutes for GSM Standby time: Up to 750 hours for WCDMA Up to 500 hours for GSM Video call time: Up to 160 minutes (The above are subject to network and phone usage.)
Expansion Slot	microSD memory card (SD 2.0 compatible)
AC Adapter	Voltage range/frequency: 100 ~ 240V AC, 50/60 Hz DC output: 5V and 1A
Special Features	G-Sensor Straight Talk Noise-cancelling dual microphones and speakers

Overall-

In relation to the original design laid out by HTC, all three carrier’s have made their own unique contributions for their own network. For T-Mobile, removal of the 3.5 MM headphone jack is the biggest loss for any customer, while Sprint users will work with a back battery cover that is unlike anything else out there. AT&T (new name not withstanding) has removed the user-friendly dedicated numeric key row and has reverted back to using a numeric keypad accessed by first pressing the Fn button. Customers of Verizon have the device that has stayed mostly true to the aspirations of HTC when they first went out to design this cellular device.