Lead sled,
With around 150 hours in the 685 I can tell you the power to weight ratio for them is better than a chieftain
Aero Commander 685. 9000lbs. 870hp cleaner fuselage
Piper chieftain 7365lbs 700hp dirtier fuselage (with vortex gen)
Having experienced an engine failure in a 685, I know which aircraft I would rather be in