Used the Q2 Monochrom for two years before upgrading to the Q3 Monochrom, alongside an X-T5 for colour. Says the monochrome sensor's tonality and low-light latitude are far beyond Fuji's: files push four stops easily and they shoot f/8 at night.
“Low light is night-and-day between this two cameras (pun intended). The Q2M and Q3M can be pushed 4 stops in editing with no problem, I often shoot f8 at night and just recover everything in post.”