Just pick one, and if you don't like it, sell it here and get the other one. This doesn't have to be the last exhaust you'll ever buy you know.
Both of these systems sound great, and all things equal I'd say buy made in USA and go with Gintani. However, I've owned the Meisterschaft myself and if drone doesn't bother you, the sound is pretty insane.
If you're just doing axle back, go with Meister. If you do the full system, do the Gintani. Can't go wrong either way really.