Materials and workmanship. Cast vs machined risers.Its like the difference between a Chevy and a Caddy. Hoyt only sells their bows through dealers(pro shops) so the Reflex line they can sell through mail order wharehouse stores. Bowtech does this with the Diamond line. Outdoor life rated a bunch of bows a while back for noise and smoothnessand gave the Reflex Grizzly great reviews, They said it performed better than some bows costing twice as much.