Hi Robert, I have hit both the CB and the AP2 and they are both fantastic irons for the highly skilled player. I noticed the CB feels a lot softer than the AP2 where the AP2 felt more clicky but still solid. There is obviously a little more forgiveness in the AP2  than the CB but not a big difference. Also, there is a new satin chrome finish on the new CB where the AP2 is chrome. Hope this helps.

Connor,

Thank you for your input.  I understand your comment about the AP2s being a little clicky, which I do not like with my short irons.  I am going to try out  the CBs to see if I like the softer feel.  

I had the original ap2's and bought the 712 cb's last year.  They are a little less forgiving but you will get more feedback if you miss the sweet spot which can be a good thing.  The biggest difference i noticed was the ball flight being lower which is why i switched to the cb's.

I had a set of original AP2 and then hit a buddies AP2-710 6 iron. Needless to say I went out and bought the AP2-712.  Played 7 holes with them today and birdied 3 of them. If you played the original AP2 you might try the 712 before you go to the CB.  Just my opinion.