You can use the mag 3-4 times before the co2 runs out. So in some ways it's more convenient. You're less likely to be caught with your pants down if your co2 runs out since it generally happens in step with the paint and all you have to do is switch the clip. That being said you can have issues keeping track of how many times you've used a magazine with the same cartridge (I used to mark the cartridge them with a dot from a sharpie after each game).
And to everyone saying the TiPX has remote line capability, so does the T8.1. Darkstar Paintball sells an adapter kit that lets the T8.1 run air out the back like a TiPX.
Edit: They did, apparently they're out of stock. My buddy just got one a couple of weeks ago I'll have to ask where he got it.
This post has been edited by nitsua: 21 August 2012 - 11:08 PM