Battlefield 3 vs. Modern Warfare 3 - run n gun/rushing?

I can't get both, so i've got to choose, I like to play run n gun aka rushing the enemy, I've never played battlefield, but really liked mw2. I really liked the scar-h and ACR in mw2 for longer distance, and the ump.45/tar for rushing. Snipers where also very good. I liked the way the weapons where balanced in Mw2, the scar had good damage and accuracy, bot low fire rate and ammo, ACR good accuracy, less damage. ump45 good damage, good fire rate, low accuracy on long range. What is battlefield like? I like to mix my rushing style, with tactical objective play, so Which game will be the best for me, and why?