Reddotforum published an interesting black and white ISO comparison: Leica Q2 Monochrom vs. Leica M10 Monochrom vs. Leica Q2 vs. Leica M10-R. The article is very detailed with many sample photos. Here is one of the conclusions:
“What surprised me most was just how well the Q2 Monochrom matched up against the M10 Monochrom. Both cameras produced exceptionally clean results up to ISO 6400 with ease. And they continued to trade blows back and forth all the way through ISO 100000. The Q2 Monochrom is priced at $5,995 and includes an exceptional 28mm Summilux lens. Compared to the M10 Monochrom at $8,195 with no lens, and $15,490 with the 28mm Summilux-M ASPH we used for testing, the Q2M is relative bargain. Of course, there are other factors to consider. The Q2M will always be a 28mm focal length camera, where the M10M offers greater flexibility with interchangeable lenses. And of course, while sharing a very similar design aesthetic and unified control interface, at the end of the day, the Q2M is an autofocus EVF camera and the M10M is a manual focus rangefinder.”
Trade-up to the Leica Q2 Monochrom and receive 90% of fair market value for your trade only at Leica Store Miami:
For a limited time, trade in any Leica camera or lens (trade-in form) towards the purchase of a new Leica Q2 Monochrom camera and receive 90% of fair market value (this offer ends on March 15, 2021 and is only valid within the United States, and only towards the purchase of a new Leica Q2 Monochrom from Leica Store Miami. The 90% trade-in value applies to Leica cameras and lenses only, not accessories or other items. The fair market value of your Leica gear will be determined once a trade-in form is submitted, and is subject to change upon inspection of the equipment.
Via Reddotforum