my two cents:
Angels Landing (and Half Dome) - all you have to do is stay on the trail and not get bumped off the two foot wide sections where there are tourists. There are cables and/or chains on both in spots. Yes there is deadly exposure one step away, but so is there climbing a tall ladder in your backyard. The difference is 10 feet versus thousands, so the fear factor and vertigo are important.
Mountaineer's Route Final 400 - No trail. A rock scramble. A few spots of class 3 in there, using all 4 hands and feet. Not as much of a "straight down" feeling, but the combination of factors might make the MR seem harder. Going up of course is easy. Coming down feels dicey. Glad I was with someone who knew one of the many routes.
If someone had never had experience with any of these, I would rate them, in terms of novices and in what order one should do them, as this:
do Angels Landing and/or Half Dome first to have some exposure before doing the MR. And don't forget, the Ledges probably offer as much pucker factor as the Final 400.
