Resized the USB-exported (PS4 share button) screenshots in Photoshop to 1280x720 and saved as *.png.
Tried to compensate for the rather high jpg compression of the original screens as well as the slightly closer camera in console D3 with assets not designed for that
I like imgur as image host more, but while it doesn't re-encode png it doesn't allow png over 1 MB it seems (converts them to jpg) :/
bonus comparison:
resized PNG:
http://i6.minus.com/iGjpZOcU7Z3XU.png
original PS4:
http://i4.minus.com/iMounYM7iPVZX.jpg
original size reconverted by imgur:
http://i.imgur.com/WeXHNFw.jpg
resized jpg in high quality then uploaded to imgur:
http://i.imgur.com/xjKdeyH.jpg
resized jpg in high quality then uploaded to minus:
http://i3.minus.com/ibzolPnJlnYDHH.jpg
I think the resized PNG looks the best IQ wise, interestingly I see the biggest difference between the the 720p PNG and the 720p jpg on imgur.
Edit: resized jpg on minus basically looks as good as the PNG and is half its size, so that's more efficient then.