Nobody said we are all the same. It's the contrary actually.
We are all different. And to focus on OP focus i.e. the vulva + vagina, they come in all shapes and forms.
There is no specific shape or form for a nationality or ethnicity.
I'll just skip the "taste" part.
The OP's question was about taste and aroma.
What was said here is that a nationality is not a factor that will influence the taste of genitals.
The OP asked about difference in taste or aroma and mentioned Whites and Asians as his experiences. Others brought in nationality, which of course means nothing because someone can be ethnically Italian and be born in Brazil. It makes their nationality Brazilian, but the genetics will be of Italian descent. Genetically speaking, aromas can differ.
This is the sort of thing I am referring to. Not shape or features/upgrades like size, tightness, moisture levels, or explosiveness.
Functionally, yes everyone is the same unless something went wrong at some point or there was an injury.
So his question was not as ridiculous as some made it out to be.