While both can be used for baking sweets, the recommended pan should be made of metal. When metal pans are used, the heat are evenly distributed within the entire pan creating an evenly baked goods. Though if you want to bake sweets quickly, use glass pans instead of metal pan. But when glass pans are used, make sure to decrease the temperature of the oven by 25 degrees so as not to burn or overbake what your are baking.