First off, fanboys- vamos. Or in other words, go away. You are not welcome here.
I think it would be unwise to tell you what side of the argument I am on, because I am writing a blog post about how stupid it is, but you're welcome to guess as well as critique every point I make and use it as evidence.
Okay now let's get down to business. Both games are shooters. Big, successful shooters. They're big, successful shooters that are releasing in the same time of year, so yes, people will compare them, right? Well, yes and no. Sure they are shooters but the whole dynamics of the games are totally different. To say that one would be an adequate replacement for the other would be silly.
Let me break that down: Someone says battlefield, I think- tactics and teamwork whereas if someone says call of duty, I think- Running and gunning, mindless killing.
Now that doesn't mean one game hasn't incorporated elements of the other, for example, I've had many 1v1 encounters in battlefield that have just come down to pure speed of aiming and tactics play a very small part in those kinds of fights. And I've played games of call of duty in which I've had much more success working as a team. But yeah, a different kind of gamer plays each game. You know yourself what you'd rather have from a shooter and you know which game you'd rather have without some internet fanboy having their say.
And here's another thing- although different players like different games doesn't mean you can be discriminating against a player for their choice of game. You can't judge someone for buying a game. You can judge someone for being a troll on n4g, but not for which game they've chosen to buy.
I wanted to keep this short... Anyway, I hope you got the idea, don't be hating on your fellow gamers for not agreeing with your taste in games. No one game is better than the other, they all have value to the person who buys it and that's all that matters at the end of the day. I'm not so naive to think this is going to influence anyone's actions but, I'm just putting out what I think of this and just saying that no one is right or wrong.
Terribly sorry if any narrow-minded people think they have a right to try and condition people into buying their game, but you don't.
Go play somewhere else...