When comparing KaiTi vs Google Noto Sans Mono, the Slant community recommends Google Noto Sans Mono for most people. In the question“What are the best programming fonts?” Google Noto Sans Mono is ranked 102nd while KaiTi is ranked 124th. The most important reason people chose Google Noto Sans Mono is:
Unicode uses 16 bits per character, meaning that it can represent more than 65,000 unique characters.
Specs
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Pros
Pro Very clear even at small sizes
This font is included in windows by default and is really easy to read at small sizes, allowing you to keep more code on the screen. It was originally designed for simplified Chinese.
Pro Excellent support for Unicode characters
Unicode uses 16 bits per character, meaning that it can represent more than 65,000 unique characters.
Cons
Con No differentiation between 0O and Il
Zero O and cap-I lower-l look the same
Con Zero is difficult to identify
As it's not dotted or slashed, "0" is more difficult to distinguish.
Con Non-monospace ligature replacements for 'fl', 'fi', 'ffl', 'ffi'
By default, the substrings 'fl', 'fi', 'ffl', and 'ffi' are each crammed into one character width, making it not a truly monospace font. For example, the word 'flag' is rendered as three characters wide.
Con Letters capital 'i' and lowercase 'L' are too similar
The only difference is almost unnoticable.
Con Difficult to distinguish between a period and acomma as well as a colon and a semi-colon
Comma has very small tail, making it difficult to distinguish from a period (full stop). Same applies to colon and semi-colon.