As anyone can tell you, not all that sparkles is Champagne.Here's how the king of fizzy wines compares to the world's two other most popular sparklers, Prosecco and Cava:.Champagne comes solely from the Champagne region of northeastern France.It's made from any or all of three grapes: Pinot Noir, Pinot Meunier and Chardonnay.Cava is Spain's most popular sparkling wine and it undergoes the exact same production process as Champagne.Upward of 95% of Cava is produced in Catalonia, and the most common grapes are Macabeu, Parellada and Xarello.Prosecco comes from the Veneto region of northeastern Italy, where it's made from a grape varietal known as Glera.Unlike Champagne or Cava, Prosecco's secondary fermentation occurs in tanks rather than individual bottles