I've owned and modified both CA and SR, both of them in the same shell too. The SR feels better in the S13 because of the extra torques, mine was also more reliable but only because the cheap mods on the CA failed at bad times - cheap manifolds suck.
CA has a better head design, SR "fully" counterweighted crank is bollocks, if you do the maths there's no advantage to having the extra counterweights, all it enables is a shorter block/sump as there's less "throw" to the counterweights.
All the "disadvantages" of the CA listed here also apply to the RB, difference is the RBs are imported and JDM imports seem to be looked after better than UK CAs which have almost all been abused through lack of oil changes.
IMHO the reason CAs have a bad rep is that they're capable of taking more abuse than the SR. In the SR lack of oil changes will block the spray bars which fucks the cam and then the bottom end, this will generally happen pretty quickly and at a low mileage. In the CA the head design is less sensitive so it lasts longer initially with crap servicing until the bottom end suddenly dies.
I doubt anyone here has had a CA from new so there's no way anyone can possibly comment on the servicing it had before they got it, a lot of the people slagging them have only had one which died and that was with an unknown history. Pretty harsh TBH
Mine lasted for 95k before I sold it and for the last 20k it was running a cheap T3 & manifold and 1.3 bar boost. Bottom end was always 100% although I had the facelift valve-wear issue and I killed a pattern HG through excessive boost