Received my Xelento Remote a few days ago. The first impression was actually meh. They surely are more fun than my T90s, especially in terms of bass. But it was a bit too much and I noticed some sibilance in upper midrange which I can't hear in T90s (and they're notorious for their peaks). T90s just sound more open and live (expectedly) but I feel Xelento's detail retrieval is better.
I usually use medium-sized silicone eartips for earphones, but for Xelento, they were too small, so I tried large eartips instead for some days. This time the isolation was superb, but they were not that comfy. I finally decided to use red/gray eartips from my damaged FiiO EX1 2nd Gen and guess what, the sibilance disappeared, the bass quantity decreased and they are now absolutely comfy.