I skiied the 186 Prophet 100s on Christmas Eve and the day before.
I really liked the ski. They rip on groomers, are ok switch, and make pow a breeze. They are definitly a little stiffer than the Seths, because of the titanium in them. I took them into tight trees repeatedly, and the length was very managable for me (I am 200 lbs, 5' 7"). They are super fun to drop cliffs on as well.
While the Prophet was very fun all around, I would not enjoy the prospect of jumping on them. They do have a bit of swing weight as a fat ski, and did not have the quickness that is very helpful in a park ski. The recommened mounting would be hell to ski switch on.
The Seth seems more toward the jib stick end, but if you are willing to learn to spin slow, the Prophet will keep you more than happy while you bring down the mountain.