id go with the emaxx, just cause im only into electric at the moment. You will endup upgradiing the tires on the emaxx and then you will end up gettiing different rims. Dont look at the cosmetics, look at the internals and compare them and make your choice on that.
Emaxx: electric, 4wd, 60+mph
Smaxx: dont make it anymore, 2wd, nitro