I get that they're using some plastic filter i.e. Kaleido 3 for Colour. Which carta version of the technology Kobo is using on their Colour devices to produce black and white?
1.
https://youtu.be/XBPKP_r6914?t=513 here the youtuber mentioned on colour devices they're not using latest carta 1300 technology to produce black and white.
2.
https://youtu.be/eYc0cJSRV_4 I purchased Kobo Clara Colour (due to colour hype in market...so many videos about Libra colour...) but I didn't notice the darker background difference as this is my 1st e-Ink device. After watching some videos I'm thinking to return it and purchase Clara BW one as I really don't intend to read manga/magazine/comics etc. 6" Kobo is my preferred size.
3. On Clara BW, 1 GHz single core processor is good enough or sometimes it's laggy especially for PDFs?
4. For Clara Colour battery is 42days with 30% brightness with 30mins readings which means around 20hours of batter life. How is the battery life of Clara BW? Official claim is
lasts for weeks...better than colour is my expection...