Kir Kanos isn't stupid. If the Imperial Guard are the best of the best of the best. Then Kanos is surely the best of the best of the best of the best (thats one more best for you slower people.)
And Kanos has certainly pulled some pretty skilled feats. He shot the pilot of a tie fighter and caused it to spin off and destroy some enemy troops or something. (I cannot be bothered to check exactly what he did.)
So to say Kanos doesn't have the intelligence to beat Fett, isn't quite right....
Its more to do with startegy and skill. If they both had a hand-to-hand fight, there's no telling who would win, Mandalorian Martial arts vs Echani arts. In terms of general all-my-weapons-vs-all-of-yours, chances are Fett would win because Kanos is not impervious to explosives. In terms of skill in battle, they are both very skilled fighters. In terms of upper-hand due to tactics, Boba ismore likely to get it because he's very agile.
If they did a comic "Kanos Vs. Fett" I think there is no chance whatsoever of it being a win for Kanos. Saying that, I doubt it would be a win for Fett, although that option is slightly more likely. All in all, I think they would end this in a draw.
Disciple Sift Through Lies; Few Grains Of Truth Be Known...