There is no big difference in performance. Pick the one with better cooling and the one that does fit into your PC Case.
But If you have some money to spare, i would recommend you buying GTX 1060 or GTX 970. They are a LOT better and faster for gaming. But, of course, they are more expensive. Up to you. In your place I would save that 50$ to buy better card. After all, GPU is the most important hardware for gaming