To me probably not as both have the i-link feature. I suggest you go to pioneerelectironics.com and look at the specs and features of both and see if there is anything on the 56 that warrants the extra money to you. You might want to print out this info and that makes it easy to take your time and look over this stuff. I just bought and hooked up my new dv47ai player yesterday. Very nice and excellent audio reproduction especially.