Actually, reflective (non-backlit) B&W LCD was better than early generation eInk in bright-to-normal light. IMO, the latest eInk (Pearl) screens are now better than reflective LCD. In dim light, backlit color LCDs are probably the best, mainly because reading in the dark without a light source is kind of dumb.
Your question needs to discriminate among these FOUR options to be at all meaningful.
Regards,
Jack Tingle
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