That's a good question - and how so often - it very much depends on what we want to achieve.
IMO the sound of the MatrixBrute is a refined interpretation of the MiniBrute (VCO-1, VCO-2, Steiner Parker filter), which has been augmented with a modern understanding of classic analogue sound creation (VCO-3, Ladder-Filter, and all those modular-like modulation capabilities).
Now it depends ... IMO we get Arturia-Sound from the MatrixBrute. If I compare the MB in the studio to Moog, Roland, Dave Smith, Oberheim synths, it is different in my ears, which, BTW, was the reason that I got it. I have made some similar patches on the MB and the others, just to learn and compare, and I would say, the MB sounds different ... but great, in any case.
This said ... if I want the classic analogue sounds of the 70ties or 80ties, the sound of MB is not exactly, what I would pick for a track and I would go to one of the other synths instead. But, if the musical idea does not ask for "true classics", which is mostly the case, I use the MB for many different roles, be it bread and butter or the particular strengths, which the MB sound-engine delivers.