Ferguson is a great motivator, he is a bully, not a great tactician, time has proved he can win things his way, his greatest achievements was winning the CL twice and that was only just, 2 goals in last few mins and penalties.
Steve Jobs is the same, great motivator, never invented anything if I can recall, Ipod was the thing that got Apple back in the big time and he didnt even come up with the idea....the rest is history.
I dont think them being in charge changed them fundamentally, they got lucky, Jobs going back to Apple and having the chance to do what he wanted and Fergie and his kids and wealth from winning everything in the mid 90s.