I don’t have a RME, but a Topping D90LE. I had compared it against the E30 before as my brother had it. In terms of smoothness mojo is better. In terms of soundstage width , and airiness, the e30 is better. Mojo has more fatter bass, e30 is leaner. I heard the same amount of details on both. Just presentation is different. But moving up to the d90, mojo lacks bass precision though it has more body. Also soundstage width is narrower on the mojo compared to both the topping, but is more 3 dimensional. Out of the three mojo still is the most analogue like sound, d90 the most detailed. I could never say, one is better than the other in every ways- it’s a matter of preference. That being said, my plan in future is to get a higher end offering from chord.