What is the difference between the old methods of execution mesotherapy (syringe, mesopen or mesogun) and Vital injector?

What is the difference between the old methods of execution mesotherapy (syringe, mesopen or mesogun) and Vital injector?

The existing methods (syringe, mesopen, mesogun) do not guarantee accurate control over the amount and depth of the administration.
Accompanied by undesirable symptoms, such as, among others, pain, swelling of the face, bruises.
With Vital injector vacum control the quantity of the injected and the depth at which you want to
provide preparation and vacuum function reduces the onset of pain and symptoms after treatment.