WTF is Pouilly-Fumé? (Fancy wine vs. Barefoot wine, Sauvignon Blanc from Loire, Wines named for regions rather than the grapes)

So, if you didn’t know, Pouilly-Fumé is Sauvignon Blanc, but from a specific area of France in the Loire Valley. Like a lot of European wines, the names can be confusing because they are named after the place they are from, not the grape they are made from. But the real question is - can you tell the difference between a Sauvignon Blanc from Pouilly-Fumé, which is going to be a little pricey, from a much less expensive Sauvignon Blanc? If you are curious about all of this stuff, this is the e...