As always Blister Gear Review has the most detailed info on their performance in all kinds of snow & conditions. Here are two of their reviews on the Peacemaker, including some comparisons to the SFB, and one preview of the new SFB:
The main bit in the Peacemaker review which compares the two:
"Comparison Summary: Blizzard Peacemaker vs. Line SFB vs. Rossi Soul 7
With the currently available skis that I’ve ridden, I find myself breaking my favorites skis of this playful 100-110 underfoot category into snow conditions. For primarily powder and soft crud, I’d choose to go out on the Soul 7; for firm conditions, unquestionably I’d reach for the Peacemaker; and if I had to pick one of the skis to cover the most of those two areas, including riding park, it would still be the 184cm LINE Sir Francis Bacon.
Bottom Line / Who’s It For?
More aggressive / powerful skiers than myself will definitely love the addition of the Peacemaker to this 100-110mm freestyle, all-mountain twin category.
And anyone who found the Rossi Soul 7, Salomon Rocker2 108, or the Line Sir Francis Bacon a little too weak, the Peacemaker may be what you are looking for.
And lighter skiers who like the feel of the Cochise or Bonafide, but wished they were a little looser and offered a bit more forgiveness, this is your ski."
I'd just read those reviews whilst thinking about what suits your style the most. Either way you can't really go wrong, both are supposed to be great skis.