Viewing PDFs in landscape is the way to go, then they are just fine.
To you paperwastage:
Both were about the same readability, however some sentences were cut in half (like top or bottom parts of words would be missing). Sorry for the blurriness of the pictures my actual camera is dead so I had to use cell phone. I would still opt for getting a PDF and just simply using that in landscape mode versus the PRC. Also, you can't change a font size with PRC so you couldn't zoom in or out.
PDF:
PRC:
