Naruto naturally had large amount of Charkra, but he would just use too much when using a jutsu but now he's learned chakra controll pretty well I'd say, pluse yess he has the sage mode to back it up now. Sauske would have his natural uchiha stamina and well..... His mind I guess which is just as powerful as we saw with his danzo bout. But I'd have to say at that point naruto would take him on pure power