Cable, or hydraulic brakes?

[Farther]

Which works the best with the motor shutoff switch that is in the brake lever on the BBS02 kitt?

 

[Nova Haibike]

I have not installed motor cutoff switches, but I cannot imagine it would matter whether it was cable or hydraulic; the sensor does not know what kind of brake it is. It would more depend on the design of the lever itself. and where/how you would mount the sensor and magnet.

 

[Farther]

I'm new to disc brakes, I'm assuming hydraulic are better? Looking at my potential donor bikes, all are Specialized Roll siblings, some have cable and some hydraulic.

 

[Nova Haibike]

I'm assuming hydraulic are better?

Generally speaking, yes. Hydraulics feel smoother and modulate better. Usually they are easier to adjust with regards to rubbing because both pads move; virtually all cable disc brakes only one pad moves. The one downside to hydraulics is that they are more difficult to service. Bleeding the brakes or replacing a hose is not as simple as replacing a cable and housing.