Bokken,
It is not a golden ticket, but surely with both the Boeing and the Airbus you have a significantly greater chance of being type rated on another company's aircraft.
IMHO a
good airline doesn´t look that much at which type you have in your license, but rather looks at your total experience and personality. It´s the Ryanair´s and easyJet´s in this industry that require specific type rated pilots, but I think it´s our common goal to escape that part of the industry...
Perhaps there is the odd exeption that confirms the rule, but I think that Boeing and Airbus rated pilots have equal chances when it comes to the
good jobs.