Shuksan is glaciated on all sides, so any route you do is going to be harder than the Cascadian on Stuart. The scramble up the summit pyramid on Shuksan is class 3 by the easiest route, If I recall the cascadian couloir, there isn't anything above class 2.
So its hard to compare. If you have basic glacier travel/rescue skills, then you shouldn't have a problem, but without that, you should look at climbing something more in your skill range, and move up from there.