I don't know if my wife's boyfriend of 6 years out performs me... But I do know he's a little "bigger" and thicker than I am. He's also a lot more "aggressive" and take charge (in the bedroom) with my wife than I've ever been.
My wife truly gets the best of both with her boyfriend and me... She LOVES being sensually dominant with me, while being completely sexually submissive to the boyfriend.
It's a win-win for everyone. 🙂