From the few months I have used the Z1Rs on an Element III, my brain has come to a fascinating conclusion with them. Without EQ, they are very bassy, thick, and dark, with recessed upper mids and some slight treble sparkle. Although this makes them occasionally muddy, they're fairly forgiving on loudly mastered music and are good for relaxing. I particularly love how they handle trance, progressive metal, and other genres relying on deep subbass. With EQ, they become considerably more neutral and better separated. Both generally maintain the bass qualities, large stage, and good imaging.If you own a particularly strong solid-state or tube hybrid amplifier and matching DAC with a detail-rich sound signature, the Z1R are great performers with a very large stage and excellent imaging. However, I think that you cannot buy blindly either of them without first hand experience, no matter how much informative third-party reviews can be. Personally, I've auditioned the Z1R headphones twice and had very different impressions due to their volatile synergy with different audio units (mainly amplifiers).
Assuming there won't be a CanJam Chicago in 2024, I probably won't have the opportunity to try the Bokeh in advance. If they share any similarities to the open Atrium or Caldera, which I did audition, then I imagine it would be a really solid pair for pure enjoyment.