Smash?? no way. In a full camp I'd say he can beat Conor but no way in hell does he smash him. Conor is dangerous in every part of this fight EXCEPT wrestling, if he's able to get conor down over and over again I can see him winning a decision, full camp or not. I think Conor disposes him within 3 rounds.
First I'd like to point out I'm a Conor fan and hope he wins, but I've seen nothing in Conor's career so far that says he wouldn't get smashed by Mendes. Conor has one single good win and that was over a ranked 8 Dustin Poirier, a dude that has never even sniffed near a title shot. The Diego Brandao and Dennis Siver fights don't have me convinced, those guys aren't even gatekeepers let alone solid wins.
Meanwhile Chad Mendes has -smashed- every single fighter in the division not named Jose Aldo, that's why he's still ranked #1, even Mendes' decision wins are completely one sided. Mendes has that wrestling that Conor doesn't, plus Mendes hits like a truck, he has legit one punch KO power. We haven't seen Conor's chin tested and Conor likes to throw kicks which most wrestlers of Chad's caliber love, Chad catches one of them kicks Conor goes on his back.
I'm hoping Conor wins so we get to see him and Aldo finally fight, but I think it would have been a rough day for him if Mendes had a full 8-10 weeks to prep.