i have both and the 205 is much better than the 103 d and somewhat better than my 105D.
I don't have 4K TV yet, but I run my 6TB USB drive with hi rez music thru it in my HT setup, and it was better sounding and less digital than the 105 D with the same files.
I don't have 4K TV yet, but I run my 6TB USB drive with hi rez music thru it in my HT setup, and it was better sounding and less digital than the 105 D with the same files.