It changes the game.. Makes tactics better and easier and its less painfulI think mag fed is more fun for sure. I played my first mag fed only event a few weeks back and what a difference. You can actually move and pick your positions without worrying about getting hosed down by some nutter with a gazzillion pods and blurred trigger fingers.
Seriously though I think hoppers have their place on speedball fields and tourneys where you need to cover and move where a mag fed couldn't provide that same guarantee the guy won't pop his head out and have a try under fire.
Personally i can't see the point of mag fed unless you want to play milsim, and if you think about it if it was possible to have in real life assault rifles and the such that could easily carry and feed a couple of hundred rounds you wouldn't choose to use a magazine that only holds 30 rounds would you.