Supposedly higher latency and worse experience when writing(also supposedly). I own Remarkable 2, and unless they can replicate same paper feeling, it won’t a replacement for Remarkable.
RM user base seems like a very niche Venn diagram:
1) People that love the feel of fountain pen writing.
2) People that love having all of their notes electronically.
I love what writing feels like, so I have a pen and paper and study offline (I typically throw out my notes). Generally, if you belong to just one of the two categories, you don't need to pay the RM premium.
The kindle will be using wacom emr which is more then adequate for most people. I never had a problem with the technology before and I don't think it will be practically worse. I can't imagine most people expect it to feel like writing on paper.
The reMarkable and the Kindle both use Wacom EMR, but that doesn't determine latency on these devices. It's all about the display's refresh rate... That's always been the Achilles Heel of ePaper. Honestly, the reMarkable 2 is perfectly fine for me.
I am hoping the carta 1200/1250 display which ever it ends up shipping with will help to reduce latency, but for my use case which is more reading and less note taking it is seemingly perfect.
But it is a nice eBook reader, yes.