There's more to striking then KOs and more to grappling then subs. Georges might be the best MMA grappler in the world. He swept Jon Fitch and passed BJ's guard repeatedly - Nick wouldn't be able to do either of those things.
And submitting Matt Hughes with an armbar is a lot more impressive than submitting a completely gassed Gomi via gogo.
To be clear I'm rooting for Nick and he's probably my second favorite fighter, but I'm just being realistic about his chances.... Even if this wasn't a terrible stylistic matchup, he's pretty outgunned skill-wise.
Oh bloody hell, he swept Jon Fitch! His BJJ must be legit! Diego Sanchez also swept Jon Fitch half a dozen times in their fight. The Matt Hughes fight was 6 years ago, and yes ,it was impressive, but again, he hasn't submitted an opponent in six years. He couldn't submit a grapple retarded fighter in Dan Hardy, when GSP had been training for months with a gameplan solely to submit him! I think that speaks volumes about GSP's BJJ abilities.
Listen, he's got good BJJ, GSP certainly isn't weak in any area of the game, but to imply that he's significantly better at BJJ than Diaz when Georges hasn't earned a sub in six years and failed to submit Dan Hardy after 25 minutes of action isn't supporting your case.
There is more to striking than KO's. Nick has stood with some of the most dangerous strikers in the game and beaten them at their own game. Can the same be said about GSP? No. What top notch strikers has GSP beaten at their own game? Thiago Alves? The last time GSP actually decided to stand and trade with a good striker, he ended up getting his nose broken and had his face boxed up by BJ Penn and was rushed to hospital immediately after the fight.
The results speak for themselves. Nick Diaz has stood and out struck top strikers and beaten them at their own game, GSP simply hasn't. Josh Koscheck is not a good striker, Jake Shields is not a good striker, he managed to drop Thiago Alves, a good striker, that's the most impressive George's has looked in the striking department against a legitimate striker in recent years.
I just don't see where this "significant" advantage in BJJ and striking comes from. All logic points to Nick Diaz having the better striking and BJJ game, which is backed up by results and statistics.