Okay, fair... correction: popular American (Napa) red wines are extremely different tasting than typical white wines, and comparing those is lauglable. In that study a French wine was used, which are very "light" and can taste more similar to white wine. Sort of like comparing apple juice and hard cider. However red Napa wines have a very distinct flavor profile -- not so light like French/Greek wines are known to be. You'd definitely know the different by taste.