number1sixerfan
Headphoneus Supremus
FWIW my first time hearing both the Corina and X9000 was on a BHSE and Grand Cayman at the 2023 NYC CanJam and I had the same impression as you and sixerfan on those TOTL amps, the Corina simply isn't a sparkly/airy headphone, it sounds more like a planar imo. X9000 however immediately made an impression on me. It was the only thing I put on my head at the show where I immediately went ooooohhhhhh. It was the one headphone there that I felt was a clear step above all my other headphones. About 3 months later I bought one cause I just couldn't shake that impression it made.
Now I know shows aren't a good testing environment, BUT, HeadAmp did have their own room AND that same sensation of something "special" I got at the show (that I didn't get with Corina) I also get at home with my personal X9000 now, so it's clear I was at least hearing that correctly. I even liked the X9000 over the Shangri-La Sr but I think that was more a personal thing that I liked the presentation better.
Here's some pics of the exact setup I listened to:
https://www.headphonesty.com/2023/03/canjam-nyc-2023/
The x9000 and SGL Sr. both are an absolute treat out of the Grand Cayman, no matter which you prefer. Really cool that you got to hear them both out of it. I would be very interested in hearing the Corina out of it, but it seems like it doesn't change much based on your impressions. Hopefully I get the chance at some point.