There is a new review of the SDAC at
audiosciencereview, where it is compared favorably to the OL DAC.
That review seems biased. Biased means when one does better than the other, it would speak for the inferior one and that review got caught there precisely. (Referring to THD, a 2.5db difference across all bands is considered 'similar', whereas at FR, a 1dB difference at very high frequencies and some even exceeded audible range, is called rooled off too quickly)
OL DAC is good at it's own price range. SDAC is great as a very basic DAC. OL DAC has added features. THD is better than SDAC, and that is something that actually matters, and the difference is not subtle.
I hate those who measure and not listen. Both sound good, both worth the $. There's no winner between these two.
I guess after all, buyers would still buy whichever is
AVAILABLE when they need one.
I don't know how much money Massdrop or Grace paid this reviewer, but no one paid me anything to say this. I personally own a SDAC and don't hate it. Just trying to be fair when seeing notably biased reviews with totally misguiding interpretation to the measured data, without seeming to have listened to the DACs themselves.
After all it didn't seem to be a review at all it's just a biased opinion which everyone can be entitled to. Why would you call it a review at all.