I wouldn't call Debian Sta(b)le fair testing. Ubuntu is a slightly better but to be truly fair you should use the latest stable production branch of each program. Or dev if that's what you're testing.
The parent argued that the comparison is unfair, but those are the versions you would get from Debian (apt-get install nginx-light apache2)
Well, the title is "Nginx Vs Apache in AWS", not "Nginx from apt-get Vs Apache from apt-get in AWS". If you can't install the latest stable releases, then don't write a comparison about them.
I don't know what versions are provided by the "amazon Linux AMI" (which the article cites as the image) but I would venture to guess that those are probably the standard (which would make the title apt)