Hi, I have the RME dac. I already had it before buying the Rose 150b. I kept it because it has many features that interest me and that the 150b doesn’t have, such as tone control, loudness, equalizer, etc. The RME is the version with Akm 4493 dac. Sonically it is very good combined with the 150b as a player. However, there are no significant differences in terms of quality. Comparing the two converters, we can say that they have a different musical timbre.
For me both devices are worth using, both the Rose and the RME have some great features that make them one of a kind. Furthermore, given the different sonic setting detected, they can best adapt according to personal tastes regarding the musical genre to be reproduced, which can be very useful.
The rest of the system consists of Mark Levinson pre+power and Martin Logan speakers.
If you need more info, I’ll try to answer. Good music.
PS.Furthermore, both Rose and RME enjoy continuous updates from the manufacturer and a dedicated forum that is always available to provide help to users of these devices. This is absolutely a commendable factor and one that very few products in the world have.