I would even venture to say that Bane is more durable than Mountain, and Mountain is pretty damn durable. Reason being, Batman was only able to gain the advantage once he compromised Bane's mask. The mask suppressed pain and basically pumped adrenaline through him. The reason Batman in the movies and comics why he lost the first fight, it always comes down to him being unable to hurt Bane. Bane just absorbs it all. Being that there is no mask exploitation, I'd say his durability is better, or at the very least, equal. Then why you factor in how strong Bane is, again comparable, then I see it as Bane's speed wins him the day. He's clearly faster and more skilled of a h2h fighter than Mountain. That's how I see it.