What is the meaning of the number of shots in a ball-neuter related to?

While researching Volneumer, I noticed it is divided into 300-shot and 600-shot options, so I was curious about the differences. I wonder if the lifting or elasticity improvement simply improves as the number of shots increases, or if the choice depends on the treatment area or scope. I am also curious if the number of shots is determined solely by the treatment area, or if factors like face size or facial fat density also influence the decision. I would like to know what criteria those who have actually received the treatment used to select their shot count. Furthermore, is there a significant difference in duration or actual cost depending on the number of shots? I mean, does doubling the shots mean the treatment period or cost would double?