Your first question is a tough one for me as I don't actually know what I meant
, I did try reading up on DSD Native vs non native, and DSD DOP etc., and I got headache afterward.
You can try Googling, or some other search on the internet but I guarantee you won't find too many easy to understand articles on the related topic.
All I can say is, the so called DSD capable DAC chips probably simply mean the ones that can accept a DSD signal directly so the AV device such as an AVR/AVP doesn't have to do any sort of manipulation before inputting it to the DAC IC. Based on ESS's datasheet, the non reference class (ESS Sabre's) ES9017 can do that, but the reference class ES9018 does not seem to have the capability.
From ESS datasheets:
ES9017
On the front page you can see that it mentions native DSD 512, that, by itself does not mean it is truly DSD native capable.
If you look at the datasheet for the ES9027Pro or the ES9038Pro (used in the AVM90), ES9038Q2M (used in the AVM70) the bigger brother, it is more explicitly that it has the input format for native DSD.
The ES9018 (used in the AV10) does not indicate it can accept native DSD directly, and then without any sort of conversion, decode it directly.
None of those things I mentioned above are explicit enough to me, though some resident DAC experts on ASR might hopefully chime in and educate us on this.
So I think I spoke too soon, the DAC IC in the Cinema 30 is only "more capable", in terms of having the capability of decoding DSD natively, but I could be wrong because the AV10's DAC IC, the ES9018 might have the same capability, just that it is not obvious, based on the data sheet:
Take a read yourself, and may be you can spot something that I missed:
The one for the ES9017 has 97 pages,
Regardless, based on my limited understanding of the matter, once you get to the level of devices such as the Cinema 30, AV10, AVR-X6800H, these sort of things are mainly academic, I will not be able to tell any difference whether it is PCM, DSD native, DOP, what matters is the original recording's quality.