What is more harder to control? Swing copter or 3x mini wave

To be honest, as long as you don't have input delay, mini wave controls aren't bad, since it goes up when you tell it to and goes down when you tell it to.

Swingcopters is more complicated, because it also does a small arc when you click, requiring you to almost know beforehand what you're meant to do with it. And even then, the speed in which it goes up or down is too erratic to be controlled like the miniwave is.