I'm reading the just-released Musk biography by Walter Isaacson and I think this is a pretty good summary. He has basically taken "move fast and break things" to the extreme and with hardware.
Musk himself is quoted as believing that SpaceX's success is in large part owed to him getting involved with the technical minutiae, whereas Bezos has other people making decisions.
Musk himself is quoted as believing that SpaceX's success is in large part owed to him getting involved with the technical minutiae, whereas Bezos has other people making decisions.