Both use E Ink’s latest Kaleido color screen technology, which has subtle, pastel-like hues and drops from a 300ppi grayscale resolution to 150ppi when you view content in color.

I had to check just how bad 150ppi would be when dropping down the resolution for color.

A 24" Full HD monitor has a PPI of 92. So it’s actually okay.

I’m still using my old Kobo Aura HD (now roughly 11 years old) and the battery still lasts over a month. The screen was already decent back then, but a bit sluggish. I just checked, the old one has 265 ppi. Maybe it’s not time for an upgrade yet :)