Does the type of PRP kit matter?

In my city PRP cost for 20-30 ML injection varies from 50$ to 200$. Doctor asking for 200$ claimed that he is using American kits and others are not using American Kits? According to his claim normal kits provide 14% of platelets in Plasma and American kits provide 90%. Moreover he claimed that others are injecting plasma and he is injecting growth factors. But other doctors also claiming they are also injecting growth factors. Please advise is there any difference of American kits and others?