Kobo Aura ONE vs. Kindle Paperwhite (2012, v1) size comparison.
In the attached pictures, the reader is set to full screen, using the option
as described on this page:
[FeatureSettings]
FullScreenReading=true
When converting files to KEPUB, there's a bug in this (unofficial/experimental) feature that cuts off part of the final letter on a line, at the right, which I have been unable to work around. However, when uploading plain EPUBs without converting them, and setting the "Use extended features" in the Kobo Touch extended driver, everything seems to work; reading progress, and everything is correctly displayed.
edit: I was mistaken in the above paragraph. The bug still exists even when sending the books as EPUB through the Kobo Touch Extended driver. The driver converts them to KEPUB. It was a coincidence that the Sherlock Holmes book displayed wasn't affected by it. According to GeoffR however, it can be fixed without patching the firmware. I'll try that tonight.
The amount of text that can fit on this screen compared to a six inch Kindle is huge. Even if you're reading in normal mode, with header and footer, the KA1 displays a lot more text than a Kindle.
(PS: I would NEVER read on a 6 inch Kobo, with header and footer displayed; it's one of the reasons why I haven't tried a Kobo before. If the full screen feature hadn't worked out, I could have lived with the header and footer on a 7.8 inch device, but it would have been exceedingly annoying on an already small 6 inch device.)
Also, I'm comparing it to one of the very few hard covers and mass market paperbacks I still have. While the KA1 can't display the amount of text the hard cover can, it seems to get close to, or even exceed, the text shown in a mass market paperback. I haven't counted to make sure. The Kindle obviously can't keep up by a long shot because it's so much smaller.
In picture r1, the red dot on the KA1 marks the spot where the Kindle screen is full. (I must admit that the Aura ONE's text is a bit smaller in this picture, but still; you should be able to fit at least twice the amount of text on an KA1 as compared to a KPW1.) In pictures r7 and r8, there's a comparison between the smallest, and next to smallest margin settings. I don't know if I like reading with all the text right up to the edge of the reader.