When comparing Liberation Mono vs Berkeley Mono, the Slant community recommends Liberation Mono for most people. In the question“What are the best programming fonts?” Liberation Mono is ranked 17th while Berkeley Mono is ranked 55th. The most important reason people chose Liberation Mono is:
Liberation Mono works well with hinting on high-resolution displays.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very readable
Liberation Mono works well with hinting on high-resolution displays.
Pro As of 2023: Second Best screen-modern drop-in replacement for MT Courier New
Metric-compatible with Monotype Courier New, dot 0 (zero), modern non-Kettler lowercase l (ell), 660+ glyphs, OFL-1.1 license
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 Has Bold typeface
Pro Plain enough
The font does not distract you with weird glyphs – but is interesting enough to be loved.
Pro Legible
The font is wide enough to be legible but not too much so you can actually fit some information on your screen.
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 Liberation fonts are ugly
Con Missing weights
The regular weight is a little bit light for me, I'm waiting for the medium weight.
