here is the site for info on the emaxx. http://www.traxxas.com/products/electric/emaxx/trx_emaxx.htm
here is the site for info on the e-savage. http://www.hpiracing.com/index2.htm
I think the e-savage would be the best choice for Durability and reliability plus it comes with everything needed the drive right out of the box. click on stuff and look around, if you dont find what you want try typing in their names in google. also the esavage is cheaper on tower hobbies.and i believe it is faster. hope this helps.