The slight difference in screen size over the One of 0.3 ″ feels a lot roomier, but unfortunately for the S4, it's not quite as good at reproducing whites as the One for some reason.
Not exact matches
The
slight increase
in screen size and resolution is going to make very little
difference with PDFs given Kobo's sub-par functionality
in that department.
Despite their
slight differences in dimensions, both phones have the same
screen size of 5.7 inches.