Judging from what I'm reading about it, the 900's signature are more in line with the 846 than the UERM. Hope that helped.
Edited by Dinerenblanc - 12/5/14 at 10:29am
Totally agree. The UE900 is fun and all, but the SE846/W60 are at a totally different level.
I wasn't making a direct comparison, I was referring to the sound signature based on what I was reading. He was wondering which IEM's signature the U900 was closer to, nothing more nothing less.