alt Hacker NewsRemarkable is quite different because it uses an E-Ink Gallery display, as opposed to the E-Ink Kaleido displays found on most cheaper colour e-readers such as yours. Gallery has true CYMK e-ink pigments while Kaleido is just mono e-ink with a passive RGB filter array on top.
I'm not a fan of Kaleido, as you say the colours are underwhelming, and the RGB filter attenuates light so the contrast is noticeably worse than classic mono e-ink. Gallery is way more expensive and slower to refresh though, so pick your poison.
I have been using color eInk displays since Triton was still thing, and despite promises everywhere that each new generation of color display was miles better than the previous one, this has never been true, and when I compare my JetBook (eInk Triton and still running Windows CE!) with the Remarkable Paper Color, I sometimes think the colors _are actually more vivid on the JetBook_. (Not a very high bar). In comparisons with the PocketBook/Kaleido, Gallery definitely _loses_. The contrast also _still_ takes a huge hit in the Remarkable Paper compared to the 2, and TFA also points that, albeit it may have to do with the frontlight rather than Gallery (but who knows).
This is the level of improvement in eInk over 20 years.