Go to Meridian's web site www.meridian-audio.com then look under library then matrix. You will see all of the Meridian owner's manuals on line. That will tell you the difference.
For everything you could possibly want to know about all things Meridian... Join the rest of the Meridian cult members at the Meridian users group: The Hitchikers Guide To Meridian.
This question has been asked and answered at length a number of times. Just do a key word search "562" in the archives.
Vince@freewheelcycle.com (Meridian cult member)