Why ball diffs?

[Nixpus]

Hey guys

Recently replaced my old Baja Champ with a Baldre. And Im wondering... why ball diffs? Whats the great advantage of these compared to the old style cogwheel based diff?

The old car had run at least a year... and the last couple of months with a eZrun 9t... the diffs were fine. Id even say they were smoother than the ball diffs in my new car.

If someone with insight could elaborate a bit Id appreciate it

/Morten