There seems to be a 2012 model that came out just before they got discontinued with a slightly better/refined sound sound and a few minor changes.
Actually, I think Tyll came on here explaining what the whole "new model" deal was about, and if memory serves, it wasn't a new model per definition. Just a newer example of the same model to see if they had changed character over a certain time span. I may very well be wrong, but this is how I remember it. It kind of makes sense though, since earpads wear out, maybe get softer and so on.