I'm sorry, but those games are the ones I'm most interested in, and I think I'm free to speculate wich one will be better. Also, I'm doing that without being offensive.
Well I'd enjoy being an engineer, and trying to shoot down enemy helicopters while capping a flag, but ofcourse that demo was from SP and is propably much more fun to play yourself.
Even tho I'm a battlefield fanboy and have pre-ordered the game I can say that.
When you do /home in the nether, you spawn in somewhere else, because in the nether 1 block is 8 blocks in the normal word, and the scales get messed up.