Tea names are finished agricultural goods sold on the open market. Tea
brands are packaging names. Puerh factories might be the exception
that take raw tea material and produce a finished product like a
canning factory. There are questions where say more Dareeling is
consumed than sold or what makes a tea organic or why two English
Breakfasts taste different. But tea is tea if it is camellia sinensis.
The tea industry doesn't work the way I understand your question.

Jim

Zoom wrote:
> Hi,
>
> There are so many green and white teas on the market, it is difficult to
> ascertain which is the most authentic in terms of purity of the tea. I
> haven't seen any studies that comparies that various teas in terms of which
> brand are least processed and have the most authentic leaves with minimal
> processing. Does anyone know where I can find this info?
>
> Thanks
>
> Zoom