Best use: Differential probes or active?

Hi all,

I plan to check waveform outputs from FS50R12W2T4 - IGBT from Infinéon - and i have questions; i'd like to avoid burning my 4 channels new scope, and brushless too.....

In short:

- to give input to MC33035 Hall A B C , brushless motor will be driven by an auxiliary dc motor

- inductive windings of real brushless replaced by pure resistors R1 R2 R3

In fact, i bought differential probes, and passive probes too;

differential probes: SI9002
passive probes: HV150 I made a mistake in title

i only want to know:

- is it a good or bad idea for watching waveform outputs ?

- how to connect probes tips : TP1 to ground?
TP2 to ground?
TP3 to ground?

Thanks a lot.

jm