I’ve extended this page about the Leica SL2 multi-shot high-res mode to include a comparison with many crops to Adobe Camera Raw Super Resolution Mode.
Both Multi-Shot High-Res mode and Adobe Camera Raw Super Resolution Mode have significant image quality flaws, which I detail/show. And when I went looking, I found some very serious flaws in ACR SuperRes mode in other images—ugly stuff that would preclude its use.
I’m disappointed in the Leica SL2 implementation of multi-shot high-res mode because it appears to be the crappy Mode1 style of the Panasonic S1R, which generates lots of motion artifacts when there is subject motion. The result is the opposite of what you want in MultiShot mode: ugly color artifacts, double images, staircasing, etc.