I'd say Red > World Breaker but almost all of that's based on Red v Uatu.
if Uatu has a glass jaw or something, if Uatu can't withstand a planet busting haymaker, then I'd have to revise my opinion.
as it stands, Red's earthquake making punches aren't anything more than Savage Hulk can do, nevermind World Breaker's world breaking energy release... so all Red's got to convince me with is the Uatu fight and possibly the Thor fight if that was indeed the much revered "Rune King".