A 9" springform holds approx. 10 cups & a 10" holds approx. 12 cups by volume of batter.  When you change pan sizes you will need to scale back on the bake time approx. 15-20mins and just keep checking for doneness.  If you use the same volume batter then your cheesecake will essentially be shorter and wider. We used a 9" springform pan for this recipe.