I would pick Whitaker, I think he could frustrate Duran by taking it to long range and using his wheels. Duran was not the best at cutting the ring off either imo. I think Whitaker was a better fighter than Duran, controversial, but its how I feel, I hold Whitaker in that high of a regard, although it doesn't bother me if others think Duran was better, they were both great.
Whittaker was a brilliant fighter and no doubt he would have some sucess against Duarn, but ultimately there would be a huge disparity in physical stregnth and power. Duran would be ably to fight his fight and keep the momentum with him for 75% of the fight. I like Duran by close, but comfortable decision.
At his most motivated Duran was capable of beating anyone from lightweight to welter. Duran is a true ATG. Pea was a great boxer and its a close fight, but prime Duran finds a way to outwork him every time.
Benitez, like Duran, was his own worst enemy. When motivated, he was a defensive wizard. That said, Benitez, as good as he was, was no Sweet Pea.
Whitaker by UD Duran had a weakness against runners and people faster than him at LW. Whitaker was both.