Surprisingly, no.
I’ve got both the first-gen Palma, and a Kindle Oasis (2017).
Ignoring anything that’s purely a function of the Palma being significantly newer - has a cool-warm light while that model of Kindle is one colour temperature only, and that it has a faster-refreshing e-ink display, etc - it’s still often a more pleasant experience.
The Palma is a little heavier (especially vs the Kindle without its case, which is typically how I use it), but because it’s narrower much easier to hold. The Oasis does have the physical page turn buttons, but I never found them to be particularly well placed, always required holding it a bit awkwardly.
It’s mildly painful for content that doesn’t reflow (like PDFs) due to the phone-like 16:9 aspect, but imho for e-books is the superior experience.
Indeed, you will note that they carefully chose the moniker “Daily Active Uniques” and not “Daily Active Users”.
I think that speaks volumes, as humans are definitely harder to retain.