It’s strange the things people see as intolerable, night-and-day issues. I can’t tell a difference myself, except that they are different fonts in different colors of course.
Are any of these Ts really better or worse? I dunno.
There is an issue open for supporting custom fonts in the code editor, you can add your vote there if you want and it may be prioritized higher.
You can also use Ctrl + and Ctrl - to increase and decrease the font in the code editor. Maybe a slightly larger (or smaller?) font would work better for you.
Also, you are not at all required to use Defold’s code editor! You can us VScode if you want, there is even a Defold API package for it here: Defold API Snippets for Visual Studio Code I use Atom myself, since the Defold editor doesn’t have some hotkeys and features that I really like to have.