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@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...
I seriously recommend not copying my mistakes. D'oh -
Please make your own, different mistakes, and help us all learn :-)