Oh, I’m so glad you asked!
Demi is a play on demi-sec, which refers to a medium dry wine. Demi-sec falls on the sweeter side. It contains between 35-50 grams of residual sugar per serving. Demi is also how you refer to half a bottle of champagne which serves up three glasses of champagne compared to the six drinks in a standard size bottle.
Brut refers to unsweetened, dry to very dry sparkling wine. It’s a lot less sweeter than demi-sec and contains about 0-15 grams of residual sugar per serving. It’s also less calories.
Finally, Demi and Brut reminds me of Demi and Bruce
and I’m a huge Bruce Willis fan. (Trivia: Look at the subject line. It’s a Bruce quote from a popular movie. Can you guess the movie?)