Here is a *very* big picture of the Aura 2 next to the Kindle Voyage (from a French review) so you can see the text clearly next to an ereader you know
https://img.purch.com/o/aHR0cDovL21l...N0dXJlLmpwZw==
If you are fussy about text sharpness, you'll notice a loss of quality compared to the 300 dpi that you are used to, but I doubt the 212 dpi would give any eye strain.
One thing I would say is that I find the Aura 2 looks notably better after a full screen refresh whereas the difference is not quite so notable on the H2O 2 as that keeps the text looking better after page turns between full screen refreshes. Though you can just set the Aura 2 to refresh more often to keep the quality up.
As the image next to the Voyage above shows, the Aura 2 has good text blackness and contrast.
They all use the same eInk Carta technology so the differences are minor. I find something like the Kobo Mini hard to read now as its screen is poor compared to Carta.