Actually the TvT in
ArmA 2 is about one hundred thousand times better than
ArmA but it only works if it is objective or team based, domination/evolution don't work with TvT. I only run aas40 maps on my server but I'll be taking it down once the
TG servers come up since it was only a temporary thing for people to play on until the
TG servers launched anyway. The
TG servers were always one server for Coop and one for TvT so whatever floats your boat you can have your cake and eat it too! It's hard to do any Coop right now because it's hard to get anyone organized to do it. Also I work nights so I can't be on usually after 8 PM Central, when everyone is playing.
Some reasons why TvT is better in
ArmA 2: You can reload while moving, you can dive into prone, camo is much better, controls have been streamlined, and there's some more as well that I can't think of at the moment.