Compared to an XT-5?
I don’t own either, but to add to what
@trevorbray has said…
Size. The H2 is bigger and with a bigger hand grip.
The screens. Fully articulated on H2 vs the 3 way tilt on the T5.
Faster buffer on the H2 possibly solely down the the CFex card but think I read it might be more than just the card.
Speaking of cards. 2x SD with T5 and 1 of each with the H2 (CF & SD)
Battery grip not available for the T5 if that matters.
Full size HDMI on the H2.
If you use a remote release then the H2 doesn’t have the traditional shutter release with the thread like the T5 however, if you use the a ‘modern’ release cable and an L-Bracket then the H2 has this relocated to the right hand side of the body and this then doesn’t interfere with the L-Bracket I believe. Possibly the same with the headphone point.
Those are the standouts to me beyond what Trevor mentions.