Try it yourself and you will immediately notice the difference
This has nothing to do with any fine motor skills we have trained in using the mouse, but is solely due to the software support that the relative mouse provides.
I first try to align the rail gun in the middle of the sun with a high quality joystick. As soon as I have succeeded, I deviate from this intentionally and try to align myself in the middle of the sun again as fast as possible.
In the first part of the video I do this with the joystick and in the second part of the video I do it with a mouse with relative mouse with full strength.
The difference is clearly visible here. With the mouse I can easily and quickly align myself in the middle of the sun with no great effort with fine adjustment but with the joystick I deviate much further from the sun and it takes much longer and it is much more difficult to place the rail gun in the middle of the sun again because I have to compensate the rotations initiated by the joystick myself completely exactly with counter movements of the stick.
The reason that this is much easier with the mouse is that it supports the opposite rotation movements that the relative mouse offers and acts as a kind of stabilizer in FA OFF mode.
Source: https://youtu.be/hpRLALj89QY