the application information for Quikoffice Pro for $4.99 requires Android 2.0 - 2.3.7...
Quickoffice Pro HD for $14.99
should work. It requires Android 3.0 - 3.2 (Android Honeycomb) that comes preinstalled on both devices.
I hope this answers your concerns, and I am sorry for the confusion.
QuickOffice Pro HD is the program you would have to use since it's written for tablets. If you already have a purchased copy (from Market) you can download and install that. There is a QuickOffice Lite that is on the device (but you couldn't create or edit documents on it. It would link you to the buy the TMobile version for the full program, which I didn't do because I already had the paid version of QuickOffice Pro HD.
Can you do work on it? Sure. But you would probably want to use something like a bluetooth keyboard to do serious typing on it. I can use the touchscreen but I find I like using a physical keyboard on it.
I haven't trying uninstalling the QuickOffice Lite HD from my springboard, but I suspect since it's on the springboard by default that I can't remove it short of rooting the device.