I think the problem described in the article is a bit beyond 'pixel perfect', though. the font weight is DRAMATICALLY different. Text being way too thin or too thick can have an impact on readability.
A similar problem occurs with the valuable Japanese font "Yu Gothic", which is available on both Windows and Mac by default (both availability is rare).
There will always be font rendering inconsistencies. It's how the web works.
> The cross-platform problem is a harder one to solve as you can't control how the operating system handles font rendering.
Bingo.
So stop trying! Embrace flexible designs and differences in rendering