Turboprops are I would guess at least 20 times if not far more reliable than piston engines. Here is some info. Most turboprops also have much better capability to fly after a engine loss with better power to weight ratios.

The PC-12 is a state-of-the-art single engine turboprop aircraft. Since the first date of
manufacture, all single engine turboprop aircraft combined have compiled over
8,000,000 (eight million) flight hours with no (that’s zero) fatalities due to engine
failure.