When comparing Liberation Mono vs Sudo, the Slant community recommends Liberation Mono for most people. In the question“What are the best programming fonts?” Liberation Mono is ranked 16th while Sudo is ranked 82nd. The most important reason people chose Liberation Mono is:
Just like Courier New (the metrics of which this font emulates), its line height isn't too big, which results in more lines on the screen, compared to Consolas and several other more popular fonts.
Question Ranking
Pros
Pro Compact line height
Just like Courier New (the metrics of which this font emulates), its line height isn't too big, which results in more lines on the screen, compared to Consolas and several other more popular fonts.
Pro Very readable
Liberation Mono works well with hinting on high-resolution displays.
Pro Has Bold typeface
Pro Four styles available
Sudo has Regular, Italic, Bold, and Bold Italic styles available.
Pro Works well on Windows
Sudo is hand-hinted for good rendering on Windows.
Pro Good legibility
Different character categories are differentiated by height and alignment. Numbers are a line width smaller than capital letters, so there is no need for a dotted or slashed zero.
Cons
Con Difference between "0" and "O" isn't clear
It can be difficult to tell the difference between the number "0" and the letter "O". However, the Fedora Project has a slightly altered version of Liberation Mono that fixes this with a dotted zero.
Con Zero is not slashed or dotted
This makes for difficulty in distinguishing similar looking characters, such as the capital "O".