Mostly the price. I've been on disability for 2.5 years now and can't afford the Touch Pro. I found a Mogul on Ebay with a buy it now price of only $125. Even after rebates and discounts I would spend $300 for the touch Pro. The one on Ebay comes with a 1Gig MicroSD card and extra charger, and all the software and documents. It even has a dock that charges the phone as well as an extra battery. So, I am kinda sold on the Mogul, lolol. Besides, Mogul sounds really cool, where-as Touch Pro sounds kinda iffy, LMAO.