To add a bit to the original question, yes, the only difference between 2012 and 2011 CU24s is that the 2012's have the contoured-bobbin 59/09s (or "squabbins"). There is one other possible difference, in that early-build 2011 CU24's were still using the Phase II tuners (closed back). The open-back Phase III tuners got intro'd some number of months into the 2011 production.
(My own 2011 CU24 falls into this category - 5-way blade switch, the original-style 59/09 pups, the V12 finish, a neck from the "Pattern" family (Pattern Thin in my case), but still using the Phase II tuners.) It's date-of-manufacture was at the end of January, 2011.