When comparing Microsoft Segoe UI Mono vs PT Mono, the Slant community recommends PT Mono for most people. In the question“What are the best programming fonts?” PT Mono is ranked 14th while Microsoft Segoe UI Mono is ranked 45th. The most important reason people chose PT Mono is:
PT Mono uses slashed zeros and a rounded lowercase "L", while all numbers are easily distinguishable.
Specs
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Pros
Pro Great readability
Segoe UI Mono is a very readable font.
Pro Clear characters
PT Mono uses slashed zeros and a rounded lowercase "L", while all numbers are easily distinguishable.
Pro Crisp on display
No pixelation on high pixel density displays.
Pro Clearest parentheses/braces/brackets
You will read ({[ something like this with PT Mono smoothly on screen on any size and quality.
Cons
Con The zero is not slashed
The zero is not slashed, which causes some problems when scanning source code. This is not an issue when the IDE supports coloring (like all major modern IDE's), but still there are instances where this is not the case. A primary example are T4 templates, where Microsoft has not yet provided coloring support.
Con No ligatures
Con Lower t stem is short, too similar to lower c
Preferentially, lower f, i, r, have feet, however fortunately lower l (ell) is tailed.