An iPad uses a fast, illuminated LCD or OLED display, depending on the model. It can show smooth animation, saturated color and video, and it responds immediately when you scroll or zoom. That makes it easy to move from Apple Notes to a browser, a meeting app or a specialist note-taking service.
E-Ink rearranges charged pigment particles to form a page. Once the image is set, it can remain visible with very little power. The display reflects room light rather than relying entirely on light shining through the panel. Page changes are slower, and fast movement can leave temporary traces called ghosting.
Neither approach is universally more comfortable. Some people prefer the quieter reflective page for long reading. Others need an illuminated screen, strong contrast or the accessibility tools available on iPad. Treat comfort as something to try, not a health promise.