Venom wins. Bane is either or. When Bane is on venom (the chemical) he loses what we saw in the Dark Knight Rises of being the highly intelligent mastermind, even the combat skills. When he's on venom he's just a very powerful brute. When he's off the venom he has all that intellect with some strength but way less than he has with venom.
Venom (the character) has all the abilities of spiderman except he's aggressive. If he were to fight regular Bane on one on one combat he would win hands down, but that would not be the case since Bane wouldn't be dumb enough to go into a fight he know he could lose and he would have a plan to take him out. No amount of Danger Sense would be able to save Venom since he is not the most controlled thinker and fights with little to no strategy.
So the result of the this match would all have to depend on which Bane was fighting Venom. Venomized Bane is strong but so is Venom and venom has additional abilities that would trump Bane in one on one combat. Regular Bane would have a plan of attack on Venom and Venom's brute force would be no match for Bane's intellect. Since the Bane we seem to be talking about is the smart one then it would definitely be....Bane FTW.