@bunify - I can't compare against the soloist, but I did have (still do have ) a FiddlerMan Concert and eventually also got myself the MJZ 905.  I started a thread here - https://fiddlerman.com/forum/s.....-star-bow/ - where I just sort of discuss my findings, make some comparisons between it and the Concert, and play a couple of fiddle tunes.  I cut the video short (didn't want to bore people) but other points I noted in the first few days of playing were - it has a great projection, it can be VERY loud under the ear (I now use earplugs), I did some basic playing in 3rd and higher and it is as "brilliant" sounding up there as it is lower down.  It is sometimes referred to as having a "dark" tonality - well perhaps - but (and I have forgotten which strings were originally shipped with her) - but - with that specific set-up I felt it was quite bright - then again - these things can be so very subjective....

That probably doesn't help with your original question - but it does try to give my impression of the 905....  so hope that helps in at least some small way...