I removed the commercial link from your post there D but you ask some good questions otherwise. Please, do not post links to commercial products. They are considered spam and can result in banning.
I tried to use an e-ink reader for comic scan reading and it was not a good experience. I suggest you spend a little more and buy a full colour tablet. It's far more satisfying and with the right comic reading app, I use Perfect Viewer, it is fine. Double page spreads can be seen but they page sizes shrink to make room to show them.
Good luck in your efforts,
-Yoc