Flavor...sensation...sort of the same thing. Spicy is that same sort of flavor/sensation with hot chiles, etc. -- it has a bite to it. Yeah, I'd say Gewurtztraminer can be spicy. Shiraz too. Actually, the Wikipedia article on taste is ambiguous -- at the top it lists seven tastes: bitter, salty, sour, astringent, sweet, pungent (eg chili), and umami; but then lists spiciness under sensations.