There are many factors to consider when Choosing Your Drift Chassis..

I Drift Both the TT-01 and the Sprint2 and the Sprint 2 has the edge over the TT01D.

BUT!

The Sprint 2 is a belt Drive.. so it will really Depend on if you can get access to Belts on a regular Basis.

The Sprint 2 comes with a 17x2T Motor or Saturn 20T both are Better motors then what come with a Stock TT01..(TT-01D's Sports Tuned is a Great motor)

As Far as Handling Goes, the Sprint2 is easily the Better Handling Chassis but the TT01 is a Stronger Build.

For Carpark Meets, the TT01 wins with its Shaft Reliability
For Track Drift, the Sprint 2 as it handles alot better...

Either TT-01 You get will need an Alloy Propshaft and a Wheel Bearing kit..

The Sprint 2 will Drift Stock with no need to Lock the Diffs, just a Tyre Change to PVC or ABS..