Basically its better aerodynamics. The thing with these rounds is that they maintain their velocity for a much longer distance, hence, being shot from 150' away feels like being shot at 10' away. The shell checks-out and is no more dangerous than a paintball, and still biodegradeable. They have to be clip-fed through the TIB clip and a new barrel is also needed for existing TIB guns, while future 'Elite' models will come with the clip and barrel fitted. The upgraded parts will take regular paintballs, so you don't have to keep switching.
My advice, go out and get the Tiberius T9 Elite ST. Then get some of these rounds, then have a completely different type of fun while playing paintball. In my experience there is no greater fun than being completely dominant over your opposition. Used to be that was through shooting an Angel etc, and its the same this time, except this time the advantage is that they are wondering where they are getting shot from, and they are still not close enough to smell the reefer tucked behind your ear. I'm tellin' ya, this is a major advantage, and an extremely enjoyable one.
No. You won't find them useful for bouncy-castle paintball, but for woodsball this is the ****.