I agree with both posts completely.
I think Kris Bryant is a very talented player but definitely overrated. His first two years were excellent (1st year - rookie of the year, 2nd year - MVP) but has been above average at best since. Being a Scott Boras client, though, he is very vocal about how badly he feels he's been treated and will probably want to be the highest paid player in MLB once he becomes a free agent two years from now. It is annoying.
Castellanos does not have the natural talent that Bryant has, in my opinion, but he seems to make the best of it. His overall attitude and passion for the game is very refreshing.
I'd love to see the Cubs sign Castellanos to a new contract and see what they can get for Bryant in the offseason.