You basically summed it up at the end. You have different taste and are likely accustomed to a different sound. The Sundaras are essentially the opposite from the 1-3kz region, with a notable dip/darkness to the mids.

Acclimation is huge for tunings like this. I have tried and enjoyed all kinds of tunings over the years, but in recent years, I greatly enjoy present mids, and have to EQ all Hifimans to truely enjoy them. I also have never found the mid hump of the clears or Elex to be that significant from a tuning perspective, but the combination of dynamic range and macro dynamics made the mids/vocals sort of attack you, making them feel more forward than they technically are.