Why I prefer Cod4 online over Halo 3 online (yes, i've played both)
1. CoD4 is more tactical, damage is realistic, you can't jump to dodge a grenade...well you can try! :)
2. I like the shooting better, looking down the barrel or using your hard earned sights or Acog scope beats halo's run and gun style.
3. Prestige mode keeps it fresh, once your top rank in Halo 3 you stay there. At least in CoD4 you can do it 10 times.
4. Knifes are cool, meleeing is old!
5. Different weapon/perk combinations for different uses. In halo all you do is pick up the shotty and own. In CoD4 you can customize any gun with a grenade launcher, different sights, and different perks.
6. Vehicles in Cod4 would just make it lame i think. Plus the levels aren't big enough for vehicles. Good luck navigating a jeep on backlot or bog, etc.
Edit:
7. Airstrikes/Helicopter support make it valuable to go on a good kill streak.
