Recently, Chromium (the open-source project behind Google Chrome) developers have made it possible to use DirectWrite for font rendering, leading to much better and clearer fonts for Windows users! The clarity matches that of OS X and Chrome OS, both of which having absolutely gorgeous font rendering. I recently switched to Firefox specifically to avoid the horrible text aliasing in Chrome, but it would appear that as of this week, DirectWrite font rendering is actually working from within the Chrome sandbox now! This was not previously possible with the Directwrite flag, which was only added recently anyways. Chrome now uses DirectWrite for font rendering on Windows by default, and has done so from version 37 and up.
Note: These are both using different fonts, so it's pretty much an invalid comparison. (Sorry!)