Kha'Zix Versus Zed - Who would win?

pure 1v1 on lane

but usually it depends on who got the surprise moment as both can delete each other pretty quick.

Zed. His R is a free win in a 1v1 because it befuddles and his instant damage output is higher than kha.

depends on isolation conditions (as in are there minions/tower)

Zed because when kha zix goes in, Zed can go in target able and do more damage faster than kha zix