Although Curry had a better year, Lebron is still the best player on the planet. Curry is unbelievable for his size but you will always have to qualify his contribution. Also, because he is so reliant on his quickness, I expect him to fall from his peak more quickly than Lebron.
I think Curry has maybe two more seasons of peak ability before a steady decline sets in. If he gets injured, it will be sooner.