Should I exchange Uncharted for Ratchet and Clank Future TOD?

The employee at GameStop said that since I got it used I could always bring it back if I did not like it and get something else, I love Uncharted, but then Ratchet and Clank Future TOD also looks great, so I came here to get other opinions on which one is better, because if Ratchet/Clank is better, I'll be returning Uncharted very soon.