Last time I checked it also had the best unicode handling too, in terms of reliably falling back to some other font for missing codepoints and getting the display of oversized characters right.
It's not immediately obvious which terminal is which. I feel like the text is sharper and, as a result, more readable in the right window, not sure if that agrees or disagrees with your thoughts
The right one is kitty. Look how the italic characters have uneven spacing, eg. the 'l' in 'bold', and some of them are chopped off, for example 'M'. Look how the percent sign on the bottom looks like it's been stretched and the circles aren't the same.
The right hand one is sharper but I have my freetype tuned to look like the left one, which looks the same as every other application on my PC. kitty is doing something completely different and incorrect.
Last time I checked it also had the best unicode handling too, in terms of reliably falling back to some other font for missing codepoints and getting the display of oversized characters right.