As With all Belt Drives.. The Chances of Snapping a Belt are always there..
If you Drift a belt Drive like your supposed to then you should be snapping Belts on a Regular basis..

The TA-05 is so smooth to drift with and its a great racer..

As Far as Drifting goes, a Locked Planatary diff seems to last longer then the Ball Diffs...

Regular Racing, then the Ball has the advantage but in drift, the locked Geared diff seems to be the winner..

It really depends on RPM's and how long you drift for..

I have never used a Ball Diff in Drift so I cant give a personal reference only those of the people I have drifted with..