I think the User needs something to compare against each other and obviously Test is pretty much the standard for Muscle building so everything is compared against it. How it actually builds muscle is not really there concern. I guess its like HGH and Test comparisons they both build muscle but go about different ways of doing it, Sarms is no different. Personally I have reacted pretty well to Sarms and can kind of compare it when I was on pretty high doeses of test. I built more muscle on high doeses of test, not saying that Sarms isn't doing that for me, but fat loss, recovery and Hardness seems to be better on Sarms.