My wife and I downloaded PDF museum passes and printed them on the same PostScript laser printer. To my surprise, hers looked much better! On the left is the printout from her Mac, and on the right the one sent from my Debian Linux machine. I am using evince 3.14.1, libcairo2 1.15.8, cups 2.1.3, and the Internet Printing Protocol to talk to the H-P LaserJet Pro 400 MFP M425dn (any other factor that could matter?).
Apparently, the printer is somehow not executing the PostScript content, which should yield a high-resolution rendering. But I am not aware of requiring that the content be pre-rendered on my desktop nor would I seek that.
What have I got set up wrong and how can I increase the output quality?