Yes, its a powder. I found this additional information on the intra-webs:
Yes there is the difference.
"According to Dr Paul Smith, a chemist at the Australian Wine Research Institute (AWRI) who’s working on tannins, ‘Wine tannins constitute “evolved” grape tannins plus some grape tannins in the same chemical state as they were in the grape.’ Dr Leigh Francis, also of the AWRI, expands on this: ‘Wine tannins are considered more complex than grape tannins due to the various chemical reactions that occur during winemaking and storage'
Further reading in some wine-making forums, it seems that they are close enough for homebrewing wine. (homemaking wine?). Since my LHBS only had this, I'm going to use it. I'll let you know how it works out in two years
As always, thanks for the reply Yooper!
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