Well, I do based on the fact Axford is younger and showing improvement from when he entered the majors in 2009. Papelbon, on the other hand, is a few years older and showing signs of decline based on his season stats. He did have a good year last season, but was really off in 2010. Taking the past 2 years into account shows Axford the much more dominate pitcher. Now one can say Axford is not going to do as well in 2012, but that would be pure speculation without basis.
Of course we don't know how any player will do in 2012, but there is no reason to suspect Axford will be anything less than what he already is, an A overall with what should be A potential. Sorry, but I just don't get how it's so easy to say Axford should decline faster than Papelbon while being a few years younger and after a fantastic year.