Should I get Star Wars Battlefront or Just Cause 3 and why?

I would personally get Just Cause 3 just because it's more of an open world free roaming game. You can practically do anything in the game. Destroy bridges, tether (attach) objects or people to other things, run from the heat and drive off a cliff and have them follow you off the cliff while you dive out of the car and watch them die in a huge explosion, so many opportunities! So many things you can do in Just Cause 3. If you are really into that kind of stuff, I would recommend Just Cause 3.