Apart from the obvious that one has a PHD and spent more time in school. When it comes to skillsets and capabilities, can one do more than the other? What about an engineer with a phd? Perhaps my idea of what a physicist does is that they just do very abstract work, can an experimental physicist compete with an engineer when it comes to technical 'hands on' work that is more grounded in reality? Also whats the difference between a theoretical physicist and an experimental one? When does one get to that divide where you can distinguish yourself from a theoretical physicist? for instance say theres an engineer and an experimental physicist, theyre both working at nasa's Jet propulsion lab, who would have the edge in developing and creating a new kind of propulsion system?