Any of the major Europe airports match the weather and intensity of your average East coast larger airport.. I did the domestic multi-sector shuttle in the RJ and the Baby Bus and while the intensity can kick up, flying overseas introduced me to things that I would most likely have to be a 10 year legacy 777 FO to experience.. Screaming into an HF radio over remote areas, weighing options for a medical diversion over central Africa, plotting escape routes over desolate western China, ETOPS, the baffling ATC of the Indian subcontinent, metric altitudes and heavy accents in Russia and other CIS, flying a freighter version with associated cargo ops, plus flying and working with dozens of nationalities and personalities I wouldn't have otherwise been exposed to.
Does all this make me a better/more competent pilot? Not saying that at all... but I'll bet it separates my resume from the crowd.. and isn't that half the battle?