I've completed and ridden the AM831, also orange like Stefan. LCFS947 was an option when I was choosing the frame, then I ended up with AM831 for these reasons:
It's a copy of santa cruz hightower, a really loved bike by many; it is lighter; the geometry is less extreme, less enduro maybe but in theory should be better pedaling uphill, that for me is very important. If I want something just for bike park I would buy a DH bike.
The bike rides very well, but of course I can't compare with LCFS947; I imagine that in real riding differences are minimal and influenced by tyres, suspension tuning etc etc.