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To make the answer simple: Brut is DRYER than Extra Dry.  Meaning that Extra Dry has more sugar in than Brut. 

The Cork Dork Says...
There are 8 categories of Champagne styles.  From Driest to Sweetest: 
  • Extra Brut - Bone Dry, sugar less than 0.6% per liter.
  • Brut - Sugar 0.5 - 1.5%.
  • Extra Dry - Off-Dry, 1.0 - 2%
  • Sec - Literally translated means dry, but has 2 -3.5% sugar
  • Demi-Sec - Meaning off-dry, 3.5-5%
  • Doux - Minimum 5.5% sugar, and has been known to have 8%

The sugar comes from the Dosage which comes from filling the bottle back up with water and sugar after the yeast cells are removed.

If you have more questions you can always read our Blog, or watch our Tasting Videos.  If all else fails then you can always email our Product Specialist/Sommelier Zach Padilla.  You have questions and we've got the answers.  Cheers!

Don't Forget... Stay Healthy... Drink Wine!!!