Uh, Tightwad, if he lives in France then the American boots will be imports also.
Mandragore, you should buy the best boots you can aford and not try to scrimp. Cats are cheap boots and are made for folks who either don't know any bettter or can't aford any better. I'm unfamiliar with the European boots, but check with a safety supply house that carries safety boots and they will list professional grade boots. As an alternative you can buy toe caps that attach to the outside of your boots that are rated the same as the steel toed boots that you are using. Depending on what job you are doing you may want to consider adding metatarsal guards to your boots as well. They cover more than the toes and protect the small bones on the top of the foot.
Take care.