Fifa 12 Much Improved

IGN have claimed that Fifa 12 is an 'incredible improvement' over FIFA 11.
They also say that once you play Fifa 12  it is 'impossible' to go back to FIFA 11.

I always expect not to have to go back to older versions of games but it does happen now and again.
Recently I went back to MW2 rather than Black Ops but after a while I was back on Black Ops and starting to really enjoy it again.