When comparing PT Mono vs Code New Roman, the Slant community recommends PT Mono for most people. In the question“What are the best programming fonts?” PT Mono is ranked 14th while Code New Roman is ranked 49th. 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
Ranked in these QuestionsQuestion Ranking
Pros
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.

Pro Completely free
Code New Roman is published under SIL Open Font License making it completely free.
Pro Looks clean and beautiful
Code New Roman seems like a mix of Monaco and Consolas, but looks very well on retina monitors.
Pro Comfortable to read
It's comfortable for the user to read Code New Roman for long periods. OpenType features include hanging or lining numerals (slashed, dotted, and normal zeros) as well as alternative shapes for a number of lowercase letters.

Pro Available for Windows and OS X
You can download and install it on Windows vista or higher (for cleartype technology support) and Mac OSX.
Pro Different typefaces
Code New Roman offers Regular, Bold , Italic, and Bold-Italic typefaces.
Pro Looks great on Ubuntu 14.04
Code New Roman has been tested on cheap Dell Inspiron with Ubuntu 14.04 installed and looks great on gtk-based apps such as Sublime Text, Geany, and TextAdept. It's also great on Qt-based apps such as KDevelop and Spyder. For electron/nwjs-based applications, it looks great on Visual Studio Code and Brackets, but has yet been tested on atom. However, it looks horrible on Swing-based apps such as Netbeans or Jetbrains' IDE.
Pro Multilingual
Code New Roman is available in English.

Pro Highly anti-aliased
This means that jaggies are reduced, making the line smoother.
Cons
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.
Con No Greek letters
Con No updates
No updates or original publisher. Mostly edited and uploaded by many designers because of its OFL license.
Con Looks bad in Windows
Too much anti-aliased in Windows.
