I have 3 WOA barrels, all 18" SPR version, & all shoot very well, 10 shots right at MOA or slightly less, clean well & are not finicky.
I have 2 WC barrels, both 16", one is a lightweight @27 oz, the other is a very lightweight at 21 oz. Both shoot 5 shots easily into MOA & are far better than I expected, & especially for the price, which was $148 each on one of their sales.
Both brands have very nice machining & rifling & clean easily. The Wilson's, even though they are intermediate gas length, are slightly over-gassed & needed AGB's to optimize the gas & functioning.
The WOA's are Wylde, the WC's a 5.56, but that's neither a deal make nor a deal breaker to me.
Not exactly apples to apples because of the significant contour differences, so take it for what it's worth.
Considering what you are looking at, I'd buy the WOA fluted 18" all day, everyday over the Predator profile or the Wilson SS profile. I don't like guns that need cannon wheels to move them around.
MM