When comparing Proggy Clean vs Panic Sans, the Slant community recommends Panic Sans for most people. In the question“What are the best programming fonts?” Panic Sans is ranked 36th while Proggy Clean is ranked 42nd. The most important reason people chose Panic Sans is:
Like its parent DejaVu and grandparent Bitstream Vera, this has tall and easily read letters.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro The easiest to read
All characters are completely readable in the smallest size.
Perfectly usable in terminal and code editors in 12px text size.
Pro Hipster among hipsters
Even hipsters will marvel at this font, praising you as the new hipster lord. It is best at around 19px (tested on Mac). Overall, it has better readability than many default fonts.
Pro Tall and legible
Like its parent DejaVu and grandparent Bitstream Vera, this has tall and easily read letters.
Pro Clearly distinguishes clashing characters
Panic Sans has added uniqueness for characters that are easily confused, such as "0" and "O", "l" and "1".
Pro Clarity and appealing to the eye
There is great line spacing and italics in Panic Sans.
Cons
Con Pixelated
This is, of course, intentional; but it can be hard to look at compared to other smooth mono-space fonts.
Con Smallest font sizes hard to read
Fonts less than 11pt start to fail readability tests. 9pt specifically has an additional issue where brackets don't align.
Con Not really good in all font-sizes
Completely clean pixels, no anti-aliasing so its best viewed in (n*12) pixel size.
Bold font-weight is not really good because of small padding between them.
Con Line spacing is small
This is a "pro" to me but some folks dislike the smaller space between lines (which is why it raises the underscore, which might otherwise vanish).