Just play styles, dude. If you prefer woodsball and scenario, you see a fare few people use tac vests. They look pretty cool and over along day of shooting im pretty sure it'll be a tad more pleasant carrying a lighter setup. (Thats if you choose the remote line too).
If you prefer speedball/sup air, really would recommend a typical paint belt/pack, as someone said above, the bottle acts as a stock on all guns that dont come with one and remote hoses are kinda limiting when popping out left/right a lot.