Person 2: Dude, Modern Warfare 2 is like Battlefield Bad Company 2's retarded cousin.
Bad Company 2 features the new Frostbite 2.0 allowing for even more destructible environments, meaning no longer can you take down a full wall by one grenade, only a small hole is opened up.
Bad Company 2 is also the first M rated game in the Battlefield serious, due to the language and blood.
It's also the first Frostbite game that will be available for PC. A beta of it is released on November 19th, but for Playstation 3 only, meaning the forums were flooded with whining Xbox 360 players. The PC beta also comes out sometime in December.
The game is scheduled to be released on March 2nd, 2009.
Bad Company 2 incorporates highly destructible environments, four-man squads as part of the overall team (as in real warfare), and realistic effects such as bullets taking time to reach their targets due to distance and bullet drop due to gravity (which makes sniping a bit difficult, but more skillful and tactical than that retarded quickscoping nonsense).
Set in the near future with an array of modern weaponry to choose from, players have access to four "kits," which include: Assault, Medic, Engineer, and Recon.
With very large maps and the option to engage in vehicular combat, players cannot adhere to a single style of play, whether they like it or not. Despite this reality, players still like to use the Medic kit because you don't have to reload as often with an LMG; and they still use the Recon kit because sniping doesn't require too much effort on their part.
Person 2: Modern Warfail 2? Pssh! I'm gonna go play Battlefield Bad Company 2 where you need skill and teamwork in order to win.
Person 1: LOLWTFZOMGBBQ!?!!? CAMPERBITCHFUCKFACECAMPERHAXSIMPLEFACTCAMPERCAMPERCAMPERNOOBSCRUBALICOUSASDFASDFASDFASSDFASDFASDF
You can even make your camping spots, and YES, camping is mandatory in this game. It is actually the closest you will come to a real-like war FPS game. The it actually has gravity, and if you want to camp and get a head shot from long range, you would have to aim above someone's head.
Call of Duty Fan: Dude! I just got a 31:0 K/D Ratio in MW2!