The cook tops that you are asking about are essentially the same. All of the smooth surface cook tops are made of glass-ceramic materials that share the properties of both glass and ceramic material. The cook top is formed as a glass and then heat treated so that it partially crystallizes to exhibit the expansion characteristics of ceramics without the porous nature of pure ceramics. This treatment is necessary to prevent breakage due to thermal shock. Ceran is a specific brand name of a glass-ceramic cook top. Various names or terms will commonly be used to describe the smooth tops used on ranges. The properties and performance of all of these types of cook tops will be about the same.
If you need more specific information or help, resubmit your question with the model numbers of the old range and the new range and we will be glad to research any specific differences between the cook tops if there are any.