I'm having a slightly hard time trying to figure out who I would rather have on my real life team. You could even go at this for who is better if you want to take it that way. 

Then I figured, I would ask some of my friends who use advanced stats on a daily basis and some of them haven't given me an answer, so I'm coming to you guys.

I'm also going to attach a poll that way its easier to just pick a vote in case you don't have an actual reason between these 2...so which one is it?

Matt Kemp or Justin Upton? Why?