The big differentiator in these products is drawing latency. Currently there's only two with barely acceptable level IMO: Remarkable 2 and Supernote a5x/a6x, both around 30ms.
I can't find any numbers for the Kindle Scribe so I guess no one has tested yet. But I also bet if Amazon was proud of the number they'd be shouting about it - especially if it was better than the others.
So Remarkable and Supernote are probably fine for another generation at least.
the iPad Pro gets to around 9ms perceived latency by using a very interesting trick. Essentially, it predicts the direction the pencil is moving and generates a short straight line in that direction. After the pencil has moved on, it corrects the line to follow the actual path the pencil took. I wonder if the e-ink companies could do that?
i remember reading that backlight on eink tablet compromises writing experience, which was why Supernote didn't add it.
I can believe that as backlight probaly requires an extra layer between the writing surface and the sensing surface.
Seeing that Amazon Scribe has backlight I imagine they prioritized e-reading vs e-writing, which is understandable because Kindle.
This is all pure speculation though.
I do have Supernote and the writing is as good as it gets for me paper-wise, my brain is fooled into thinking I am proofreading text printed on paper, which was all i wanted from that device.
I can't find any numbers for the Kindle Scribe so I guess no one has tested yet. But I also bet if Amazon was proud of the number they'd be shouting about it - especially if it was better than the others.
So Remarkable and Supernote are probably fine for another generation at least.