A bike store owner was able to tell me in less than 5 min., the key differences amongst MU XL for 2009, 2008 and another variation MU XL Sport by pointing out certain bike parts.

He was abit forceful in his explanation, probably a slightly impatient person by nature. Meanwhile his 2 clerks/mechanics stood by, listening respectfully and absorbing every word. The 2 guys were good people because they listened carefully, answered my questions where they could, showed me certain things, etc.

Of course we didn't get into the MU SL which I didn't ask.