I had a 2009 SR groupset which I've just sold and understand that the shift action is betters in the 2012 onwards groups, it's just down to whether to for for SR again as I'm not too bothered about the red highlights.
Actually, the 2011 onwards incorporate the changes that make the 2009/10 groups slightly less desirable. Aside from the cosmetics, the three main functional differences are:
1) Shift action is stiffened up a bit and feels more positive (2009/10 had very light shift action that many Campy users did not like, so they made it stiffer again).
2) The front chainrings have more pins and make for much quicker and crisper front shifting. Very nice.
3) The return spring in the rear derailleur was stiffened up a bit allowing better movement "down" the cog ramp. Still very important to have clean friction free cable routing however.
Either of the groups you're looking at are great and it is true that a few grams difference (ti spindle for example) and the red ring and other highlights come at a very high cost. So, go with what you feel comfortable spending.