I have both. The Schafer is a smooth smooth shooter. I ordered it custom, waited 12 months, and it was surely worth it. A Schafer is truly a hand crafted, custom bow. Performance is great.
The Predator I got recently, and it is also a great performer. It does not have all the custom options you can get on a Schafer, but the fit and finish are very good.
For me the grip is the key. My Schafer has a checkered grip that I love. I put a Shur-Grip on the Predator, and now I love it too.
Sorry I cannot be of more help. I would order a Schafer custom, then get a Predator second hand. That way you can shoot the Predator for a year until the Schafer arrives. Then you'll have to decide which to keep.
Brett