I have an older Kindle Oasis - but 90% of the time I use a mostly dedicated 10" Android tablet. I prefer the colors, especially when reading non-fiction and working with highlights. There's also a satisfaction to seeing my library in color. I also like the better browser and ability to read other types of books (including graphic novels) on the fly. Plus, the tablet has USB-c, so charging is easier.
If traveling and space is an issue, or there will be a lot of sunshine, I grab the Kindle.