I have had 4 streamers and 3 of them are as it gets.
- Sonore microRendu
-Sonore OptcalRendu using fibre
- Lumin X1 using fibre and testing the streamer section only
- PlayBack Designs Streamer-IF (using SPDIF for now, once I get a PDB Dream DAC I will use the fibre output of the streamer)
None of these 4 streamers sound the same. The microRendu is way behind in terms of sound quality to the other 3. I believe the reason is analog noise traversing the streamer from the Ethernet and then through USB into the DAC.
The surprise for me was how good the Streamer-IF sounds. It is good as the Lumin X1 and the Sonore OpticalRendu. I think the reason is that there must be a fibre wire inside the Streamer-IF that both the Fibre and SPDIF outputs use.
Listen to a stream that uses Fibre and one that does not. It should be very easy to hear a difference, even on a good network.