Kobo Aura One:
Pros : 7.8” screen is massive like a hardcover book. Super thin and lightweight. Waterproof. Option to get 32GB which is useful when reading comic books or lots of large PDFs. Nice feeling back cover. Ambient light sensor.
Cons : early reports of battery issues, though seems to be fixed with recent firmware. Screen refresh takes milliseconds longer because screen is bigger, consequently feels a little less “snappy”. Some reports that tapping the screen is not as responsive as smaller devices. The Comfortlight Pro LEDs shift from cool blue to red, and while somewhere in the middle it looks fine/good, some people feel it gets excessively red when shifting the color further. Ambient light sensor often doesn’t work how people want it to. Expensive.
H2O2:
Pros : 6.8” screen is bigger than standard 6” eReaders. Waterproof. More portable than a KA1. Not as expensive as a KA1, so you may actually feel comfortable carrying it out of the house. Nice feeling back cover. No common issues or complaints; it is what it is and works.
Cons : usually cross-shopped with everything else and seen as more expensive than a 6” reader for only a little more screen real estate and waterproofing. Screen resolution drops from 300ppi to 265ppi - still pretty good though. Unlike 6” Clara HD or Aura, you can’t open the device and upgrade the memory card. A little heavier and thicker for its size than 6” reader.
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