My husband believes that this ball holds the bounce longer than the "average" ball. I tend to believe him....he is not right about much but when it comes to tennis he is ALWAYS correct.
The best reason to buy Babolat tennis balls by the case is that there is a 0% chance anyone else will be playing on a nearby court with them. That's probably why they're not numbered. And maybe why they start to look like the Muppets after playing with them for a short while. But who would want to hit Kermit? But I digress.....