Honesty i can put in any COD game and see no difference, they are all the same to me, MW1=MW2=MW3 BO=BO2, every halo game feels significantly different. there are some things i like more about halo 2 than H3 or Reach and some things i like about halo 3 more than the others and so on. lets hope Halo 4 will put all these together, add a few new elements as well, and pull off a great game for us.