XPT Transmission Differences?

Ok, who can give me specific differences in the XPT Transmission over the 2015 the XP1000? I know it has a different input shaft, has a gear driven reverse and a flanged front output shaft. But I want to know if there is more than that like enlarged bearings, increased gear diameter and shaft sizes, etc. I’ve heard they LOOK way different from the outside but I want to hear from someone that has seen the inside.

I’m looking to see if the XPT Transmission is worth adapting into my older Z1 / XP900 chassis. Honestly the geared reverse and front output doesn’t motivate me for my driving / terrain style.