Similar to what was said above, you really can't even compare these two phones. Not so much because they're so different, but because the Mogul is prehistoric to the Touch Pro.
My Mogul had so many issues that it really wasn't worth keeping for the hardware keyboard after a few months. I got sick of the infinite vibrate on text/e-mail, constantly running out of RAM, soft resetting daily, and having a brick in my pocket. I got the Mogul the first week it came out (I think it was March 2007 or something?) and after about a month I was so frustrated with it. I tried a bunch of different ROM's, but was never fully satisfied with the phone. When the Touch came out in Oct/Nov that year, I had to pick that up. That phone was blazing fast compared to my Mogul, but after a few months with it, I regretted ever trading in my Mogul for it because I missed my buttons, scroll wheel, and of course, the hardware keyboard.
Then I got my Touch Pro on the day it came out last year. At first, I was in awe by how fantastic the device was. Then after a few weeks I thought it was a little too sluggish for what it is, and I was getting frustrated about how long it took to input using the hardware keyboard and also how it would open up the Phone app while texting.
I've been running Mighty's ROM's since he released 4.7 and now I couldn't imagine having ANY other phone, let alone the Mogul. Once I flashed Mighty 4.9 + and got rid of VistaHide battery gauge, all my woes with the TP are gone. I literally do not have one single (significant) complaint about the device. Sure, it's missing some buttons and doesn't have the scroll wheel which we all love, but it's not supposed to. It's called the TOUCH Pro. Not the BUTTON Pro.
The TP has the following advantages compared to the Mogul:
- Faster
- Smaller
- Better keyboard
- MUCH better screen
- Nicer form factor
- Less frustrating (never have to close apps, rarely have to soft reset, and the Home key is awesome)
- Nicer camera
- NO telescoping stylus! (I f-ing hated that thing)
- Switches from landscape to portrait (and vice versa) much quicker.
The Mogul is like a kitty cat in the proud lion king Touch Pro's jungle.