Late to the thread, but I've ridden both (different sizes).
My take on the Belafonte: super stable, very supportive, not great in tight spots, doesn't like more than 6-8" new snow.
Bibby Special/Governor? My favorite ski from Moment. Charges like the old Garbones but gives you as much float in deep snow like the Comi. Honestly, it's the perfect blend of charging big mountain ski that can slay the pow and bust through crud like a freight train. Even though it has a flattish tail, because of the long rockered shovel, the Bibby Special/Governor pivots a lot easier than you think.
If I had to choose? Go with the Bibby Special/Governor. Hands down.