comparing the 2 is a bad idea.
the fact of the matter is most people on operation sports are north american. most of those are American. soccer is not very popular over here. im canadian and obviously hockey is huge here but the nhl forums always pale in comparison to the madden or mlb forums. its simple numbers.
what I do find interesting is that it seems like Europeans from the stuff ive read are more critical of fifa because im guessing they have a better understanding of the game and its nuances. just like in the nhl forums. Canadians generally seem more critical of NHL.
I have said a couple times of how much I love this game but I have friends that no matter what I say they just wont give it a chance. I myself am a sports gamer. I dont care what sport it is I buy all of them every year. I even played that cricket game ( which made no sense to me) this year. thats why I love operation sports. its got info for everyone. if you dont like the review chances are you will find someone in the forums who feels the same as you.