Garmin Tread-Base Edition Vs Garmin Zūmo XT


I have a Garmin Zumo XT and a friend of mine just bought a Garmin Tread-Base Edition. They look very similar to one another. So, I entered the two into this and found there are a few differences.

Anyway, for those familiar with them, are there any other differences that you are aware of that don't show up on this comparison? The Tread MSRP is $100 more than the Zumo XT, so I am wondering if the features are worth an additional $100.