Esoteric CO3 preamp vs Mark Levinson 326s

Thinking of upgrading to the 326s or the co3. Do not need phone stage. Will be used with a Mark Levinson 335 amp and B&W Matrix's 800 speakers. Speaker wire and interconnects will be Transparent Ref MM2 and the same interconnects xlr Balanced. I listen to Classical to Rock to Folk to Jazz. Would like to hear pros and cons of both preamps.
Thank you for your time.