There have been some big changes in Battlefield. Call of Duty have just used an updated version of their current engine and added dogs..

Battlefield 4.

Why?
Because Dice makes so better and realistic games while Call of Duty has turn in to repeats recently and nothing much really changes in Graphics..

Battlefield will blow CoD away no problem!

What Infinity Ward is doing new this year: adding a dog to call of duty.
What Dice is doing this year: EVERYTHING

COD may sell better but overall battlefield is going to be a much better game.

My personal opinion is that Call of Duty can get boring and each year, it's near enough the same thing, in different locations with different online upgrades, perks etc.

Battlefield just holds so much which you can do. For example the maps are so big you won't know where to expect someone all the time, you can actually hide online and use all types of killstreaks to hunt down the enemy team. Battlefield all the way!

CoD is done, me and my friends are doing the switch over. They're running out of ideas. Besides BF is more realistic.

Its now clear that Battlefield 4 has more pre-orders than CoD so the tables turning finally. BF deserves the attention.

Battlefield 4 ftw! I really feel that the call of duty franchise fell off after Modded Warfail 2

I Pre-ordered Battlefield 4. The China Rising Maps look insane! Plus the fact that they came out with the new Commander Mode. With players playing battlefield on tablets, it certainly sweeps COD.