It's a more business-oriented device. IIRC they did something similar when they initially offered the 8700.
As for an official reason why TMO opted for the 8800, store reps aren't the best source for such info.
Originally Posted by Pizzle
The 8800's that Tmo has aren't Cingular products rebadged. They're handhelds made by RIM that happen to be the exact same ones sold to Cingular, only with different branding.
Right -- it's like saying the 8700g is a rebadged 8700c. RIM markets models to multiple carriers.