The Zutty page includes a link to a blog post “A totally biased comparison of Zutty (to some better-known X terminal emulators)", which includes some interesting discussion of features of different terminal emulators, including comparison of VT support levels, and discussion of why this could be important. Foot is another interesting new terminal emulator - targetting Wayland only, and not GPU-accelerated, but with some design choices that make it faster than GPU-accelerated terminal emulators in some cases, as described in the wiki “When is foot fast, and when is it not?".