Michael . composed on 2014-10-16 10:45 (UTC+1100):
a site can look very different from one machine to the next.
That's a good thing. A standard and necessary web browser feature is accommodation of source to environment. Appropriate font and viewport sizes vary all over the place according to user needs, hardware, and available space. Looking "the same" would only be good from one designer's perspective, because not everyone who sees at all sees everything the same.