Forrest would have been a tougher fight than Oscar because Forrest has great right to go along with the jab. Floyd countered with rights over the jab without fear of a meaningful right hand following behind it. Oscar's right has improved, but it is nothing like Forrest's right cross at it's best.

Don't minimize the size difference. Hopkins was able to get in those right hands because he had size and reach to do it. Wright at 154 was bigger, better fighter than Oscar at 154. Plus, he's a southpaw. Floyd has some success doing the things you talked about, for sure, but it would still end up a clear decision for Winky.