Originally Posted by
WillCAD
I see more battery savings on my phone, a newer LG V20, than on my tablet, an older Samsung. In both cases the difference is very slight, however, so I should have mentioned that in my original post.
LG V20 has an LCD screen.. so no power saving at all with black vs white. If the screen on it's on. Devices with OLED leave pixels off for black hence the slight power saving.
OP, I would get whichever one is on sale next week for black friday. If you're going for one of the more basic models I don't think there's much difference. I've been happy with my paperwhite and calibre for book management.