That comparison is very enlightening. The Windows version is very sharp, but the letter forms are completely distorted and it looks like it’s switching typeface as the point size changes, or even within the same sample. Look at the horizontal lines in the “z” in the larger sizes, they are very clearly too thin and don’t harmonize with the surrounding letters. Look at the relationship between the top of the “u” and “a” in “quartz”. The straight lines in the “u” serifs end at the exact same height as the curved top of the “a”, making the “u” appear, visually, to extend higher. You can clearly see in the Mac sample that there is some antialiasing on the “a” to fix this issue.

I can understand how years of Windows will make the Mac sample look fuzzy, but I’m convinced the correct and harmonious word shapes on the Mac are much more important for reading flow.