I owned an older model at one point. They're notable for having a large sort of cylindrical area on one side that acts as a grip. While I personally wouldn't use it for reading comics (but that's because I'd rather have a larger screen; see my other comment talking about screen sizes), they have an integrated stand that hooks up to that cylinder, so you can prop it upright, which may be more-comfortable if you intend to use it in the landscape orientation with a table in front of you for long periods of time; it provides control over the screen angle, like a laptop. Most tablets and tablet-cases-with-integrated-stands can't do that.

I got mine mostly because I wanted a tablet with a long battery life; the cylinder provides space for a (comparatively) large battery. It also has pretty decent speakers as tablets go, though I don't imagine that that'd matter much if you're looking to just read comics.