The engines aren't the big difference. It's the operating procedures in commercial aviation that are much different. If I step into a single engine Cessna in my

The engines aren't the big difference. It's the operating procedures in commercial aviation that are much different. If I step into a single engine Cessna in my private time, I'm allowed to fly with almost no equipment, very little reserve fuel, no plan for an alternate airport, in shitty weather all by myself. Now if I step into a plane with passengers (even if it's the same small Cessna), suddenly I'm no longer allowed to fly single pilot IFR operations without autopilot, need much higher fuel reserves, need to plan an alternate, check weather requirements and have done a 6-monthly checkflight and training. And for most airplanes I would also need a co-pilot, so there are two people monitoring everything. Most small airplane crashes are not due to engine or equipment failure, mostly it's pilot error, and that's where all the extra procedures in commercial aviation really help.