I think the fact that you are given 100% control in character creation, from their look, how they travel, and their power set has A LOT to do with it. Two Fire/Fire Blasters, while on the surface should be the same can look different, one may fly while the other has super speed and their power set may diverge 100 different ways through secondary and Epic power set selection and how enhancements are used. Each character becomes the players creation, their work of art, their hero or villain. For me, that has always been the difference between Cox and all the other games out there.