jaapv
RFF Sponsoring Member.
Yes, but deliberately shooting B&W only makes one look at the world differently and will produce different images. If you have the ambivalence of choosing between monochrome or colour in postprocessing you mindset will not be on producing "real" B&W.Keep your EOS.
You have the M240 and seldom convert to B&W. The M240 makes fine B&W files if adjusted correctly. If you were exclusively shooting mono then I'd say yes to the Monochrom (It's the camera I use 24/7).
And there is no way that a converted image will match the tonality of either Monochrom.
I prefer the MM1. It somehow has a more organic look. The 246 is superb as well, but to my taste a bit smooth and closer to a converted Bayer image.