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.