I still have half a bottle of 'Against ...' a home, and quite nice it is indeed!
My understanding is that CV was a quite young Springer; I've seen 5-6 y.o. mentioned somewhere. 'Against ...' is a 10 y.o., with some quite old stuff vatted in. I've tasted CV once, at a colleague's house who had a range of Springers, so have not had the opportunity to compare it side-by-side with 'Against ...'. However, I must say I wasn't too impressed with the CV then; it did taste quite youngish (but my colleague also had 21 y.o. and 25 y.o. lined up!).