To clarify, I know as good as nothing about DBZ or GT. I read the Mangas, watched most of the DB animes (cause they were excellent), watched a few of the DBZ Animes (cause they sucked really, really bad) and I didn't get around to watch GT, though I plan to do so some time, my love for DB has decreased in the last few years. On top of that I did all that in German (in case you'd like to object).
I was just bringing up the mid nineties Superman for two reasons, one that I know most of my shit about him and two, because in an earlier Goku vs. Superman debate dvampire, Darth Janus and Creshosk convinced me that Superman could indeed beat Goku, which I didn't believe at first, seeing as I only knew Superman from 1993-98 and some JLA beyond that and wasn't aware of the exponential growth in power he went through after that back to Pre-Crisis or stronger. Also, as a fan of DB I always heard the "DB Characters are soooo overpowered" thing every one was throwing out earlier, I guess they don't do that anymore.