I'd say a healthy Shogun is better then most UFC fighters and in a few short months he'll prove it by taking the title that should be his already. He was really the only young up and coming fighter that came over when pride was bought out, he was by many considered the best LHW fighter in the world before his injury and he's arguably the best LHW fighter in the world right now as well.
Crocop, Nog and Vanderlei Silva all had their best years in Pride and in MMA you usually don't sit at the top for very long so it's not really a surprise that these guys are all on the decline now.
In it's prime Pride was better then the UFC i don't know how this could even be debatable. In the early 00s and late 90s the UFC was nothing more then a stepping stone to get into Pride. I remember the UFC sending Chuck over there when he was tearing trough the UFC and Chuck got his *** whooped bad by Rampage who at the time was just a middle of the pack fighter in Pride.
There where a ton of former UFC champs going there as well who never managed to do much. Don Frye, Ken Shamrock, Mark Coleman, Kevin Randalman and Josh Barnett where all at one point UFC champs. You can look at those names now and laugh but 10 years ago when they where all making the jump to Pride they where all considered the cream of MMA and where all in Pride, some times even on the same fight card. Mean while the top dogs in the UFC was people Like Chuck, Silvia and Arlovski and we've all seen how they fared when matched up with Pride guys.
If you compare Pride in its Prime vs the UFC right now, the UFC fares really well. Your right when Pride was up and running it was superior to the UFC of 7 years ago, but the UFC right now is better than Pride. The UFC has the best heavyweights right now with the exception of Fedor. The have arguably the best pound for pound fighters in Silva, Penn and St. Pierre who will wax anyone's *** in their division. Shogun is now in the UFC so you have to call that a wash. While you are right about Shogun beating Machida, Machida easily beats an overrated Wanderlei Silva and I think Cain Velazquez proved how the UFC has evolved by KOing a still good Noguira who also got owned by Mir. The only fighter that pushes Pride past the UFC is Fedor, but he has fought for alot of other organizations so I wouldn't call him a Pride fighter.