Based on what? Rory has beaten multiple fighters in the top-10 and his only losses are to the best of the best, Robbie and Carlos, neither of them beat him with wrestling.
He's beaten - Maia, BJ, Ellenberger, Diaz, etc.
Askren has beaten....Jay Heiron? Lima?
Rory's career is so much farther along in terms of accomplishments than Askren it's not even close. And he's never had problems with wrestlers.
He'd smash Askren, and until Askren beats at least ONE fighter in the top-10 he's going to remain one of the most overrated guys on this forum in my mind.
Crushing lower to mid-level fighters doesn't mean much to me. It's also why I think Matt Brown is overrated, but at least he always has extremely exciting fights.