I am down to a couple of cases of 2006, 2007, 2008. I personally love all these wines. They are aged but no where near over the hill. Price is steep, compared to the newer wines, but probably the last time these are available. Check out Cellartracker reviews and also search the Wine Talk forum.
The 2011 is ready to drink, leans more toward AFWE. 2012 is a bigger boy. 2013 was so fun, then took a (typical) step back 9-12 months after bottling. I need to look in on that one. But it is just as the others - no difference other than vintage.
Remember, these are as representative of “terroir” as you can get. Less than an acre, all planted to Cabernet. All Valley floor - very homogeneous. I have never purchased any fruit to add to what I grow. So what you see, vintage to vintage, are my decisions on when to pick, how to barrel them, and how to make the blends for the Special and the regular Black Cat. The biggest difference vintage to vintage is “simply” the weather.