Being bigger because you are taller does not make one a better bodybuilder. I like bigger guys too, but Rockel simply out conditions Ruhl, plus he has better aethetics. Ruhl looks lumpy and was holding water.
Agreed, he was better conditioned, however, he just does not look as impressive when next to the bigger guys. And the contest is primarily judged in comparison rounds. So when standing next to freaks, being super shredded doesn't really matter. Judges just look at how much less muscle he has. This is a pro BB show. Not a weight class show. He could have done well if there were weight classes, however as a pro you are up against everyone. Most BB fans that go to shows don't really care if the guy is that cut, most of them don't have the seats to appreciate it anyway. They want to see the freaks. In the posedowns when everyone is out, it looks bad for the little guy.
NPC shows are judged evenly since there would not be a freak standing to the left or right of you until the overall if you make it that far.
Edit: Ruhl also knew that he didn't really need to peak for this show, cause the O and the Grand Prix is a week away, easier to peak once and ride it out (as the Grand prix shows are back to back ) vs peaking and waiting a week to compete again.