An ND555 dac section on par with what Dave currently offers would reassure customers they made the right choice again, buying a brand well deserving its reputation.
It depends what you mean and how you are comparing. We will have to wait for implementation and chipset details... as well as obviously listening to it... technically Chord Electronics Hugo and Dave have more accurate reconstruction than the current Naim DACs/Streamers and even the CD555. However better accuracy and detail doesn’t necessarily mean prefereable sound for all clearly.
I suspect (and hope) the big plus for the ND555 will be performance consistency across transport types and streaming conditions and optimisation to more closely resemble and exceed the CD555 sonic character. I’d be surprised if Naim depart from their more traditional DAC approach.... as there is a lot of know how on optimising that architecture now albeit it’s quite classic and established in approach... but we will have to wait and see.
All DAC reconstruction is necessarily a compromise and at this level I believe it’s about personal preference on how it’s done and where the compromises are made.