You should taste a good lambic next to a sour beer, you will notice the difference. Maybe it is more astringent, but a good lambic (or derived) does not taste like acid. While sour beers I tasted, taste acid, sharp like lemons or sour milk.tart
ADJECTIVE
sour, acid, or astringent
sour
ADJECTIVE
having an acid taste like lemon or vinegar.
Can you explain what you mean by " These beers are not sour, they are tart."