While at the airlines/Fractionals I saw a HUGE difference between us Freight Dogs and everyone
else. When you are stuck in the soup by yourself on a dark night shooting an approach to mins with no autopilot and only your skill you become a good pilot.
I saw a huge difference too. The guys who had done nothing but freight couldn't see what was wrong with decending at 6000'/min and not putting flaps /gear down until on very short final. Also didn't believe in shooting more than a 2 mile final because it was much cooler to turn final really close in.
And don't get me started on pax comfort..... I'll give in and say single pilot IFR is more challenging than a two crew environment though..
I flew with a guy from Airnet that had an accident in a Lear (close to total loss of the hull), and had also failed a PIC check on a Falcon 50 at another company. But somehow still wanted to brag about his ability to roll a Lear while at Airnet...I was less than impressed