When comparing Anka/Coder vs Operator Mono, the Slant community recommends Anka/Coder for most people. In the question“What are the best programming fonts?” Anka/Coder is ranked 20th while Operator Mono is ranked 39th. The most important reason people chose Anka/Coder is:
The zero really stands out and looks quite different from zeroes in most other fonts. The addition of the slash means you'll never have to second guess if that character is actually an "O" or if it is a "0".
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Zero distinguishable thanks to protruding slash
The zero really stands out and looks quite different from zeroes in most other fonts. The addition of the slash means you'll never have to second guess if that character is actually an "O" or if it is a "0".
Pro Open source
Because it's open source, Anka/Coder is freely available to anyone.
Pro Practical yet stylish
Anka/Coder has just the right balance between style and readability.
Pro Compact
Condensed and, even to a greater extent, narrow versions allow for compact lines without sacrificing readability.
Pro Has a script version
Operator can be used to mix the same font for syntax formatting.
Pro Super readable
Long strings can be read in Operator exceedingly easily. The font just flows nicely, with all the benefits of clarity that provides.
Pro Horizontal width not as wide as other fixed width fonts
You can legibly read everything and get more characters per line.
Pro Adorable italics
Cons
Con Some characters aren't distinguishable from others
This is especially the case with the colon, which is barely distinguishable from the semi-colon.
Con Not quite as charming at sizes of 10 and 11 pt
There are some hinting issues at these sizes: upper curves are bent sharper while the lower look is squashed to the baseline. Also, the dot of "i" appears merged with the stick at 11 pts. At 9 pts, the font looks good again (nice for watches, compiler output, etc).

Con Relatively expensive
At $179, this font is on the more expensive side.
Con Roman style isn’t very appealing
