When comparing PragmataPro vs 6x13 fixed, the Slant community recommends PragmataPro for most people. In the question“What are the best programming fonts?” PragmataPro is ranked 21st while 6x13 fixed is ranked 37th. The most important reason people chose PragmataPro is:
The compact design of the fonts allows for effective editing in 2-3 windows side-by-side, even on a laptop screen.
Specs
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Pros
Pro Narrow width saves a lot of space
The compact design of the fonts allows for effective editing in 2-3 windows side-by-side, even on a laptop screen.
Pro Comprehensive Unicode character support
PragmataPro, more so than most fonts (even non-monospace, professional fonts etc.), supports over 10,000 glyphs of the Unicode standard; many of those symbols, letters, and special characters are quite useful in writing and programming (e.g. PragmataPro + Vim's conceal feature makes writing LaTeX pretty beautiful).
Pro Very clear and legible
The font has been hand-hinted with legibility in mind.
Pro Has ligatures
This is useful for those using letters that are joined, such as "æ".
Pro Most complete
The font has the most glyphs of any programming fonts (more than 7.000).
Pro Well designed
6x13 fixed is the apex of bitmap fonts. It has a nice, defined character set and great proportions for quantity of text onscreen, making for excellent readability. It is aesthetically pleasing for a bitmap font and has been deservedly termed 'classic'.
Pro Legible at small sizes
At a small text size, each character has a limited resolution. A character size of 6x13 pixels means only 78 pixels per character. Modern fonts are designed to be scalable and are less legible at these small sizes. Using bitmap fonts increases legibility by eliminating scaling and sub-pixel aliasing artifacts. Some scalable fonts include "ppems" embedded bitmaps for this reason.
Pro Available on every X server
6x13 is the classic fixed monospace bitmap font that is expected to be available on every X server. It is part of the misc-fixed family. These fonts were handcrafted for readability in a terminal.
Pro Widely available
It is distributed alongside the X Window System.
Cons
Con Can be expensive
The cost for the bold font is $20 and this can get as high as $225 for the full package.
Con "Bold" is more like heavy/black rather than bold
If you use bold to highlight keywords, you may find that bold version of the font is too bold and disrupts the flow of the text. Bold is heavily used by many IDEs, so you may need to adjust code highlighting settings and use other means of highlighting keywords, or maybe choosing a different color for bolded words.
Con Crowded-looking
Pragmata Pro is quite crowded in appearance, making it rather unattractive.
Con Doesn't have a slashed zero
The absence of non-slashed zeroes makes it harder to distinguish "0" from the letter "O".
Con Extremely small on high-DPI screens
While it is crafted for a screen where the pixels are visible, bitmap fonts do not work well on high-DPI screens as they do not scale too well.