Ok. What makes you think BF is harder? Just grouping up with other people and doing relatively the same thing?
Bullstuff, IE COD: No noticeable recoil, kill everything by just shooting at it for 10 minutes on end, gamebreaking killstreaks that stack, if you get 3-4 kills in a row you know where everybody who isn't moving is, easy camping, headshots that don't matter, secondaries beat the primaries, assault rifles are jack of all trades master of none, submachineguns are death machines, rpgs are used as primaries, unbreakable plastic shields, incredible weapon misbalance (the colt 1911 in black ops had worse stats than ANY of the other pistols in the game. same with the ak47.)
Okay, IE BF3: Actual recoil, destructible environments that somewhat succeed at preventing camping, vehicles that are not vulnerable to bullets, no killstreaks, just vehicles, headshots do substantial damage, assault rifles have almost the best qualities of all of the guns, submachineguns are bad at range but good in cqc, better customization, larger, clearer maps, balanced explosives like rpgs, no adamantium shields, and good weapon balance.
