For your hot date, you have a decanter with 1 litre of red wine and a decanter with 1 litre of white wine. While you're off stoking the fire, your conniving little brother takes one teaspoon of red wine from its decanter, pours it into the decanter with the white wine, and mixes it thoroughly. He then takes one teaspoon of the now-slightly-diluted white wine mixture and mixes it back into the red wine decanter. You are furious and send him to his room. You're now going to serve only one of them, the least tainted. Which decanter (red or white) is less diluted?