Why would u put ps2? Of course ps2 is going to get lower scores after ps3 versions come out.
If u want to look at ps2 before ps3 came out, it used to get 90s as well as 80s. This game has been around for ever and it always gets higher than 80 even though not much changes from year to year.
It's because the new generation of Maddens have significant differences in gameplay with new features. The Madden 2011 and 2012 will have lower scores because EA won't change to much and repeat the process.