I recently got my S console installed, and days later attended a Meet X event so was able to compare. A couple differences I noticed:
- Since X console is integrated, the sidewalls flow directly into the center arm rest and it's more stable. But they're plastic instead of the stitched leather on the S, which doesn't feel as nice.
- Flip top is a textured plastic instead of the smooth piano black trim, which also doesn't look as nice in my opinion. I happen to have piano black so mine matches nicely, but I can see how people with other decors would be annoying.
- X sliding door is MUCH better. As others mentioned, the S sliding door is annoying to press down to open. On the X, it's a gentle press to release back into closing position
- X slot for "blind holstering" is extremely tight and won't accommodate any case whatsoever. The S console doesn't have these side parts, and my iPhone fits with the Apple Silicone case
Overall I do like the S console better due to the leather and piano black, although I do like how the X version is sturdier (wiggles less) and has a better sliding door.