The closer I look, the harder it is to see (unless you zoom into the pixels and look at the colour fringing). But just glancing, it's clear to me that the "Anti-aliased" text has a distinctly fuzzy outline, while the "Not anti-aliased" text appears much more crisply.

At a glance, and as a Windows user, I prefer the "Not anti-aliased" rendering; as the article says, it is actually anti-aliased, just not sub-pixel anti-aliased. With the text size so large, I don't think sub-pixel anti-aliasing is doing it much favours.