I have DMR enabled on my 996p2, 436, & SDS200 and they all do the job. The audio from the 996 sounds a little off compared to the others and DMR HTs, however its still very understandable.
The main thing I miss on the 996 DMR experience is showing me information on a newly discovered signal. The 436 & SDS200 will show you CC, TGID, etc information about the signal. They'll also expose that information across the "serial port" to programs like ProScan. The 996p2 on DMR however doesn't display that information on the screen or convey it across the serial port to ProScan. That being said, I still enjoy DMR on the 996 and would do it again. "It just works" and falls in line with my 15x/996 view point that they are simple/straight forward to just turn on and type in a frequency and you'll get audio.
In terms of receive quality, I haven't noticed any difference while casually scanning/listening between the 3. So I'd fall back to saying the antenna & location are the prime drivers.