I personally find the contrast better on my Kobo glo than on a printed book.
I also find the font clearer and less corrupted around the edges on my Kobo Glo than most printed books.
My wife gave me a physical book to read recently, which I have been reading, to my horror, tapping the right hand side of the page didn't flip to the next page!
I had to PHYSICALLY turn a page!
Jokes aside, I found the reading experience of the ereader far better than that of a physical book for many reasons.