I've heard plenty of people say the graphics are better on PES, but whilst playing the game the graphics are exactly the same as Fifa, its just when it goes to the cut scenes of specific players ie. a good shot where you can actually see the players, they look remarkably like irl, which is much better than fifa. I agree there are specific game modes that are better on PES as there are with Fifa, the actual gameplay though is better on Fifa imo. I would only buy one or the other a year and for the last few years it has been Fifa!
For players to be 99/98 OVR though is crazy, on PES im assuming the attributes only go up to 99 so that means he is the perfect player (Ronaldo). I remember there was outrage when Messi was 95 on Fifa12, the distance between the OVRs of Barcelon et al. and even a 4/4.5 star team makes it almost impossible against a half decent player to beat them online.