FIFA and PES are like Batman and The Joker, their entire existence defined by the presence of the other. You can't play PES without talking about FIFA's licenses, and you can't play FIFA without talking about PES' gameplay, because those things are as much a result of targeting the competitor's weaknesses as their own inherent strengths.
I love to replay games. It’s something my colleagues occasionally give me crap for. They worry I’m sacrificing time I could otherwise spend on new games re-experiencing old ones. I do play games for a living, so I always try to maintain a healthy mix of new ones in my rotation. But I’m almost always replaying something.