Height vs speed.
So, it’s like this:
From Level 1, Caldarius can double-tap X … jump, then jump.
If you jump, then press a direction with your left stick and jump again, you THRUST that direction. Forward, Back, side or side.
GRAVITIC ASCENT is used for if you want to get to a really high ledge, though you’ll need to be fairly close to it as you only have normal lateral movement control when you’re there.
IMPROVED THRUSTERS is used if you want to really frustrate anyone trying to hit you, because it increases the distance you’ll move forward-back-side-side, rocket-skate style.
Mostly, these are preferential, but we already have some maps which favor one choice over another.
wouldn’t surprise me if he was a robot tho 


