Kindles are slow, they get slower every year (I suspect it is intentional). Kindles crash now and then, my Kobo hasn't crashed once. The Kobo is quick, it has slightly better screen (I don't experience any ghosting as I did on my Kindles). Also more tweaks on the Kobo (like how to turn pages). The power button has a much better placement, so you don't accidentally click it. Kobo is also much more intuitive to use, partly because it doesn't try to steer you to their shop all the time :] No ads, and perhaps the most important thing of all; it's not Amazon.

I got Kobo this summer. Have been a Kindle user for years (three whitepapers, one a signature ed.),

Tried the Clara Color, but the screen doesn't feel as good. You get a hazy'ish filter on everything due to the color layer. I think Clara BW is the bestest😁