Press 
A while back, an FAA administrator declared that there can only be one level of safety. It is a comforting thought that, no matter what aircraft you fly in, you are equally safe. But once again, it can’t be true. A multi-engine helicopter with ultrareliable turbine engines will always be more dependable and capable, or “safer,” than a single-engine piston training helicopter.
Source: Let’s Be Honest About Safety – Helicopter Association International
