It's an interesting question and a good problem to have. Who has more long term value, Sano or Buxton? Asked another way, what car sitting in my garage will be more valuable in the future, the Porsche 911GT or Ferrari Testa Rossa? To be clear I don't own either and you can't compare ball players to cars but its just an example I thought of after reading the comments above. In my mind, long term means 5-10 years. I see Buxton being a huge impact player for the next 3-5 years. However, as he ages he's gonna lose a step or two in speed, etc. Long term I think Sano has the edge. He could be pounding out homers playing a DH or 1B role until he's 40 if he stays in good shape...A la Cruz, Ortiz, Thome, Bonds, etc, etc...