It's the same 6,100+ feet of elevation gain, but in approx. 4.5 miles rather than 11.2 miles on the MT. So steeper, esp from Iceberg Lake to the summit plateau.
Truly, Steve's videos will give you a very good idea of the nature of the trail, as those videos touch all the highlights from start to finish.
Here's a picture I copied and reposted here from one of the other topics re: the Ebersbacher Ledges (which is a small segment of the Mountaineer's Route earlier in the hike):