Difference between ESS Sabre Burr Brown Wolfson DACs

tparr... thanks I enjoy reading your comment
i also had a Rotel cpd now I have a classic Sony CDP707ESD love it.

Would I get better sound with a stand-alone dac using my oppo203 as transport or continue using my marantz sa14s1 as my dac ?

@tparr I have an experience similar to yours I own an older Onkyo CDP that uses the Wolfson 8742 chip and a new Benchmark DAC3B that uses the ESS 9028PRO and I find the Benchmark presets more detail especially in classical and Jazz than my old Onkyo . Some may prefer the sound character of the onboard Wolfson and the Onkyo , I certainly enjoyed it for years until it came time to try something new and noticed what I had not been hearing. In my opinion, if at all possible, it's good to try different implementations of the DAC chip as you said there are no cut and dried answers to which is better it might be more of a which do I prefer question. 

Nesto
  I’ve never heard the Marantz, but I own the Oppo 203.  The Marantz retails for about 10 times the price of the Oppo so it should have a better DAC, but why don’t you connect the Oppo to the Marantz and let us know what you think?

to the comments on ladders vs chips - they are in fact all chips (with very few, expensive exceptions).
Cheapest R2R used semiconducor resistors in ladder; best use(d) hybrid film resistors. Many modern ones used discrete resistors at very high cost, mostly because you cannot buy R2R chips any longer (yes, i know about AD's chip, and its  PITA to use due to inherent glitches)
Just keeping the discussion from having red herrings