With select fire it has more recoil than the vector.
literally just spent 10 minutes testing it.
the vector is strictly vertical recoil.
the chicom sometimes pulls left, sometimes right, sometimes up, and occasionally it will randomly pick 2 and then switch to 2 others mid spray. As an example: hard left for the first 10 shots then hard right for the next 10 then straight up for the last 16.
The vector's recoil is much easier to control because it's only vertical. Chicom will go left, right, and up at random.
Strictly holding the trigger against a wall may make the chicom look like it has less recoil because the bullet spread is tighter sometimes but if you're shooting at people and compensating for recoil the vector will be significantly more accurate.
In case you decide to try it for yourself you should know that the recoil numbers work very weirdly because you don't get the same recoil every time. You have to try it quite a few times.