Both cocktails use sparkling wine. A traditional mimosa is a champagne with orange juice. A bellini is typically made with pureed peaches. While this may be how both of these drinks began, these two terms are pretty much interchangeable. u003cbr/u003eu003cbr/u003eFor me, I typically consider any juice mixed with sparkling wine as a mimosa. And I consider any pureed fruit (or one with nectar) and sparkling wine as a bellini. But in legit cocktail circles, you may get laughed at if you use this designation so don’t say I didn’t warn you!