Sparkler types

[andypandy]

Thanks Wino. There is a great post from Bucko in the Champagne thread about sparklers under $15. I guess to clarify my question, if I had a refined wine palate, and I tasted a california champagne and then a true champagne, or a cava and then a prosecco, and so forth, are there characteristic differences between these different types? Or is there too much variety within the different types to say? What is it that really sets the wine of Champagne apart from the others? I have A. Immer's book but she doesn't really go into this.