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Amazfit BIP S has a very similar transflective display with the same resolution but 64 colors instead of 8. That would remove the need to dither and is lots more readable for text in colors the bangle would have to dither.
Do you have it and can you compare how white color looks on both, preferably outside? Similar/same 64 color screen is in DK08 watch and there the white is not so nice. Bangle 2 screen has better contrast and is a bit nicer outside. As for outdoor visibility I would not trade DK08 64 color for bangle 8 color but maybe Amazfit screen is better. I've posted some photo for comparison somewhere but cannot find it now. DK08 is still good enough but Bangle 2 is better - possibly because of only 8 colors.
EDIT: found it, here https://imgur.com/a/DzYhaIg , bangle 2 screen is actually slightly better also indoors in low light when backlight is turned off
fanoush-
I think you are correct in regard to the DK08 probably having the same display as the BIP S, the display differences are very close to what your pictures show. I had remembered the display to be better since it is the one point I liked better on the BIP S as I got my Bangle. But in hindsight the tradeoff between less colors vs. more contrast might actually be in favor of the Bangle display for me overall. The moment the backlight comes into play its hands down the 64 color display of the BIP S.
halemmerich
Amazfit BIP S has a very similar transflective display with the same resolution but 64 colors instead of 8. That would remove the need to dither and is lots more readable for text in colors the bangle would have to dither. Needs a bit more bandwidth and RAM but probably makes up for that in saved CPU cycles for the dithering.