I would think there would be connector issues as well. But if one were to find the proper spare connector, the red one is the positive, the black is negative, and the other is the speed indicator.
Probably the voltage is the same. It would say on the sticker on the back of the hub of the fan. Don't forget to check the amperage! If it is significantly greater for the replacement, it will not function as well as it should and will burn out prematurely.