OK UE900 vs R3 listening to Collin James tune "Down in the Bottom" using my computer playing out a Little Dot DAC1 and an Indeed Tube Amp.
R3 - neutral sound with the OK detail but feels like it is missing something in the mids. This headphone is very smooth and clean, the comfort and smoothness mean they will never be a fatiguing IEM. But they are not a super resolving IEM with tons of detail and the beass and treble are both on the polite side.
UE-900 - neutral sound with lots of detail, bass is tight and punchy, mids are crisp and detailed, treble is detailed and crisp but never sibilant. The headphone is comfortable and while detailed and punchy also can be listened for extended periods without fatigue in my opinion.
I will be honest. The UE900 slays the R3 in terms of detail and dynamics. But at 3-4 times the cost I would have been unhappy if it didn't. This isn't to say the R3 is no good, it just isn't up to slaying the UE900. If you have heard the UE900 and find it's detail to much or find it edgy then the R3 would be an excellent alternative as it's more polite signature would suite you very well. They do share a similar type of signature though in that they are both neutral and slightly on the bright side. I want to be clear though. The UE900 is my FAVORITE BA based IEM I own. So there is bias on my part towards it's sound.
Thank you for making it clear for me