Dithing isn't an issue with me but I think I recall using the Cinnamon shell of Linux Mint, it has a control panel display setting where you can change the dithering type or just turn it off.
Comparing the latest Chromium build to Edge (viewing the same web page side by side); Chromium uses the same default fonts as Edge, but there is a slight difference in the appearance. Maybe Edge is using some old IE rendering or something proprietary...
While I will reiterate my motto of "if it works for you, great, keep doing it" that's hard to make sense of. any Chromium based browser is going to be the same no matter what the wrapper around it is. It;s the exact same rendering engine, that's the whole point of Chroimum is one identical rendering engine so no matter what browser you are using with it, devs only need to code to one standard
I find old versions of Firefox to be the best for my eyes, and chrome to come in second. I have to pick a new theme since the default one has the light grays that kill my eyes.