I've never really compared them directly, but I have a good idea of how they both sound. I'd happily compare them for you, but unfortunately I've had hyperacusis in one of my ears, and I haven't been able to listen to headphones for the last 3 months.
The Bokeh has a very fun tilted sound, with your typical meaty ZMF midrange and bountiful bass. The LCP drivers are pretty unique and lively sounding, with snappy and nimble qualities.
In wired mode the Solitaire T has a more refined, reference sound. The bass is very controlled and not nearly as boosted as the Bokeh. Both headphones have very well tuned treble range. The T does have that trademark Biocell sound that's somewhat smooth and rounded, so it doesn't come across as being very cold or sterile. Can't really comment much on the staging of them, although neither are as big as the AC/VC.
As far as the overall sound of them, I'd put them as being more different than they are similar. Both are great closed backs, and I enjoy them both quite a lot. I just wish the T had slightly bigger cups/ear pads.