I have done sculpt and Sweat 3-4 with ab ripper 200, twice each.
Lets just say it is no normal jump. Levels 3-4 are WAY harder.
Couple differences:
1) I moved up from 10lbs to 15-20 lbs and still doing anywhere from 12 to 15 reps.
2) I 80% of the squats and lunges with dumbells
3) There 40% more pushups with different variety
4) Less rest time between sets
5) Sweat has more pace and intensity
6) I use 2lbs hand weight when doing leg kicks and arm punches
7) Ab ripper 100 does very little to prepare you for the 200. I just keep up with Tony and the kids. Just keeping up means very poor form by the end of the round. I am now not trying to keep up but concentrate more on form.
My body feels very drained after each work out and I can feel a difference the next day with my recovery as my muscles feel slightly heavy in the morning.
The best news is my body is changing and I am leaning out with greater definition.