In all fairness to this thread:
American football is about brute force, speed, and hitting lines (and ball carriers). A defense, once it stops the progress of an offense, leaves the field.
Soccer is a more "diplomatic", not-as-much-contact sport in which two slowly moving sides do not get the benefit of a deadball count, as action is rarely halted.
It's like comparing the physical fitness of bears versus cougars. Both survive, and both thrive.
And, for the record, I love them both.
Soccer or real football my friend is both an art and a chess game.
American football was started by some Ivy League nerds who couldn't master that and picked up the ball and started running wih the ball.
And that's a fact jack.
That's a good comparison.