@gdhal
Yes, DAC3 and Oppo will sound the same. Not because they use similar chips, but because all decent modern DACs sound the same.
I am glad that you are happy with your purchase.
As regards bit perfect PCM -- the DACs in the Yggy use R2R ladders, at least that is my understanding. The precision of such DACs is not infinite or bit-perfect, because you cannot make perfectly precise resistors. To make a 20 bit DAC work, the resistors have to be really precise -- the tolerances should be less than one in a million and stable when temperature changes, that is < 0.0001%. Those are some accurate resistors! And even with very accurate resistors, the steps between bits will not be uniform, so there will be no bit-perfect output. I wrote a simulation program to see how the accuracy of resistors affects the output of such DACs -- with less accurate resistors you might not even get monotonic output. That is, you go one bit up digitally, but the output voltage goes down. Strange, but true.
Now, don’t get me wrong, the chips in the Yggy are excellent. But if you read their application note, you will see that they deliver about 19 bits in real life. And that is just the chips, the whole device cannot do better than that. DAC3 has just been reviewed by JA in the Stereophile. It delivers about 21 bits of resolution. Not that one could hear the difference between 19 and 21 bits.