Dera,

No tanker guy flys 737s. Our formation flights are usually more relaxed than our pointy nosed friends, but hardly as easy as 121 world. As a 121 guy I’ve never been asked (and given) to give away so much gas that I’m below bingo for the only airfield I can land at. I’ve never been so low on gas over a hostile country that I can’t make it home without a successful air refueling. I’ve never lost an engine over the arctic while flying a jet home with a cracked main landing gear on a one time flight waiver. Finally no RJ driver has ever been told to loiter for hours within the engagement envelope of a hostile nation’s (we were bombing they) SAM batteries because their gas is needed and the CFAC is willing to gamble their lives that the hostile nation won’t take the shot.
RJ guys do benefit from experience in the 121 world. My new hire classmates from that world did great and have nothing to apologize for, but the FAA would never let a 121 pilot be deliberately put in scenarios that are routine in military operations. A pilot from an exclusive 121 background may or may not be able to handle the things military pilots have been through, but they haven’t proved it.