lemme help you out.. you don't seem to be helping your case
these are all fundamentally made the same,used for the same thing, some might be better than others.. ofc its a bias butlets assume some are better than others.. they are still fundamentally same.. functioning is precisely the same.. hence fundamentals all of what is shown in the picture is PASTA and are directly connected.
using this instance with the way i compared them and reflecting it upon Coa we find out....
Coa hardening and Coa invisible is the same..
one is just better
since the ingredients are the same, the function in the same, used for the same purposes.. fundamentally they are the same its just one is harder..
now the problem i find with your argument is the lack of consistency of your comparison..
Sanji has the ingredients and capable of producing invisible and i believe sanji has hardening to... but you are willing to assume that 1 marine soldier in DR who is vastly inferior to sanji's caliber and hasn't even faced similar opponents can pull of hardening but someone of a completely different league can't even if he has the same ingredients.
tthats NONSENSICAL.. AND MENTALLY DEPLORABLE.