Football is more of a chess match. Two sides trading blows, scheming, sitting back and making coordinates plans of attack.
Soccer is freeform and very pure as far as competitive team sports go. So is rugby I suppose, but soccer is a bit more exciting and dramatic for me. Marathon runners are very athletic for sure, but watching someone run on a preplanned route for 3 hours is not entertainment. With soccer it's hard to get simpler...two teams, one ball, two very wide goals. Constantly running and going at it.
I don't care about most soccer teams so that's why I don't watch. But you gotta love the World Cup. So much energy and excitement. And things are constantly happening in a soccer game. As opposed to football, which I love the strategy aspect of, but there are just sit down breaks CONSTANTLY. You can't miss a moment of a soccer match without getting pretty out of the loop, because anything can happen at any time. You can miss some football time and just check the play-by-play to get the story.
And the highlight reels are sick.