I take it then that you're not running the Cary balanced. It mates exceptionally well with the 120S, running balanced; OK with the 211 monos, and is a mess with the 805's, IMO. I think (no experience) the Dodd would be a better match with any SET amp.
In my opinion, having owned the Cary, and just heard the Dodd (on several occasions), the Dodd is a vast overachiever; while the Cary is a very good preamp, especially run balanced. A slightly different flavor of neutral tie, IMHO, if using the RCA's only.
I'm an SET guy. The Dodd reminds me of the linestage in my Manley Steelhead, which I love (with my Cary 306Pro). Since I only need one input other than the phono, this suits me fine.
In anticipation of your question, whether or not the linestage of the Steelhead would be an upgrade from one of the (SE) stages of the Cary would be heavily dependent on what amp you're using. KT88 based amps, or the like, I would lean toward the Cary. Low powered, the Dodd.