You haven't done judo, have you? I went into judo after wrestling (wrestled in college), nothing weaker about it at a competitive level. The main difference is that in judo you've got a lot of recreational guys, who are generally out of shape compared to wrestlers. But if you fight in higher level tournaments (belts mean nothing in judo, its rated by tournaments) everyone's strong and fit.
The idea that judo is "gentle" and doesn't use strength or speed sounds great, but has nothing to do with real competition judo. Or put it this way, if judo was weaker, every wrestler who couldn't make the olympic team would put on a gi and go to the olympics in judo, picking up an easy olympic medal for the trophy case.
Funnily enough, a lot of judo guys who've never done wrestling think that wresting is weak because the only wrestlers they've seen are guys who just wrestled in high school. For that matter, I've played football against the guys at the local park, and none of them are strong and fast ... the NFL is full of guys like that, right :icon_twis
The only major difference I've seen between judo and wrestling is the gi. Judo is jacket wrestling. Which to do depends upon whether what you're going to do involves wearing jackets or not. If you're going to compete in gi based BJJ, judo is better. If you're going to do no-gi submission fighting or MMA, wrestling is better. If you're interested in self-defense and you live in a northern climate where people wear jackets, judo is better. if you're interested in self-defense and live in a souther climate where people don't wear jackets, wrestling is better.