I've used GW prior to osta and they are different animals. I would use ostarine to cut before gw though.
For your goals you mentioned I would use osta. But I am no expert.
My endurance on GW was awesome. I had never run under a 9:30 mile, I can run under 8 minutes now.
Last edited by alkaline; 22nd December 2015 at 10:55 AM.