GSP can always say i fought a man 15 lbs bigger if he loses to Bisping. GSP has a better shot of beating Woodley than Bisping, but the Woodley fight is 50/50, with a loss likely being a Woodley KO, whereas the Bisping fight it's more like 40/60, with a more chance of a decision loss than a KO. There a good chance Woodley can knock out GSP, which would look very bad. GSP doesn't have the one strike to knock you down power of Wonderboy or the submissions of Maia. Woodley will not fight like this last couple of fights and will stuff takedowns and go for the knock out.