Based on my limited experience with the SE846, I understand it has significantly rolled off highs, and a robust, yet rumbly bass. I think the Roxanne's signature will fit this profile better than the Aether (despite its tendency to sound sibilant with poorly recorded/mastered tracks). The Aether to the SE846 is a clear upgrade with a more transparent midrange, and a cleaner and sparklier treble, which allows it to have more clarity and resolution than the SE846. It's a matter of preference: if you want a better SE846, go for the Roxanne. If you want a better IEM, go for the Aether.
Between Roxanne and Aether, which one U think give bass impact ala Se846 ?