Should i join the Marines or the Navy?

My stepdad was a gunny in the marines, so he really got me wanting to join. I also have been looking into the Navy. Whichever one i go into, im going to be an officer. Im not sure, the Navy has great travel opportunities, and other stuff, but they dont see combat. The Marines have such strong brotherhood, as i can see when my stepdads USMC bros all come over. They are the few and the proud, and are full of pride. They also have the highest fatality rate, do to them being at the front lines. Also, what does a 2nd Lieutenant do in the Marine Corps? I'v heard everything from "All they do is paperwork, to "they lead the Marines into battle.