Funny thing is I started playing KZ2 online over Xmas.
Yes it was OK but I found the maps a bit predictable.
If you went to the same place on a map it seemed like the enemies would always come from the same place.
So I went back to MW2 online and have to say it appears to be much better imo.
Much more random I feel.
Having said that I do like the authentic feel of the guns in KZ2 so might try campaign eventually.
MW2 is just so addictive atm and loads games much quicker.