I don't see any difference in sharpness and contrast with the Boox devices without writing foil - I only have these
I have Poke Pro, Poke 2, Poke 3, Nova 2, Note Air 1.
The 6, 7, 7.8 inch devices have 300 dpi, the 10.3 inch 227.
All manufacturers buy screens from EInk - there are no differences in this regard
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