[Ripplinger]

Here's a comparison scan of the 2 readers showing the darker, thicker font (scanned side by side so a slight camera angle can't distort the text). Both are Caecilia, size 32 (with GeoffR's patch, not sure if that number changes without the patch for the same size, I seem to remember it does), and font weight set to the highest at 8. Reader at left has firmware 2.4.0 and the right has 3.11.0. I do the same comparison each firmware update, and 3.8.0 looked the same as 2.4.0 with identical settings, there was no noticeable difference in the font thickness.

When I tried it at the lowest font weight setting on both readers, they were closer to being the same but still the 3.11.0 firmware was slightly thicker. But on the reader with 3.11.0, it wasn't an even font thickness throughout the page. The top half was noticeably lighter and thinner than the bottom half of the text, which I thought was really odd.*

The chapter title ONE is blue in the book, that's why it's not as black as the rest of the text on either sample.

*Edit about the uneven font on the page: It seems to be caused by the font menu overlay on the bottom half of the screen. Once you turn a page, the difference it gone and all pages have even, uniform font thickness from that point on.