With high-speed printers, I believe the main advantage of the HULA is that it reduces the shaking of the table without having the machine rock back and forth, like you see with the upgraded Bambu lab anti-vibration feet.
Quality improvement might be minimal because the Bambu lab printers already print so well. Like the ringing test you showed above, it has to be something you look for; hard to see in day-to-day printing. What you will notice is the reduction in table shakes and noise.