>>31965635Generally Porygon2 is renowned for being one of the best users of Eviolite. Z-moves went a long way to making Porygon-Z just as usable now, though.
Porygon2 has a fair bit more defenses that Z, but Z now has unique access to one of the best Z-moves that allow it to be a special wallbreaker. They can't run the same nature, but they can complement one another through the opposite strategies they can take advantage of.