@lalitk The difference is pretty substantial, sonically. I don’t think the A200 would deliver any better than what he’s got going now. The DAC3 is a good DAC at its price point, and the N200 is a more transparent and engaging streamer than what is in the A200.
Overall, Aurender’s analog output units (with DACs built in) are an attractive way to have a single box for digital, but being the critical listener that I am, I think there are better solutions out there to solve for what the OP wants to accomplish. The DAC in the A15 is quite good, but very linear and detailed, much like a Mola Mola Tambaqui, vs focusing on the natural harmonics and refinement that makes music emotional and tangible. This is not a criticism so much on the Aurender, as the A15 is an incredible value as a combo. It’s basically the $6,300 N200 paired with a ~$3,500 DAC. The $15K A20 is much more realistic sounding, in my opinion, as it should be given almost double the price, and I have a high affinity to that.
My suggestion would be to stay the course with the N200 and find the right digital chain to complement. I think of it as matching a phono stage to a cartridge. The N200 is a stellar source, and the DAC needs to complement the N200 in ways the rest of his system can benefit from.