The comparison between Angela Merkel and Hillary Clinton is apt. Both are smart, hard-working, thoughtful, educated, experienced women who are also somewhat dull and rather lacking in the charisma department. That didn't seem to bother the German people through four election cycles because the German people clearly place a higher premium on qualities which better prepare a person for the arduous task of running a country. We on the other side of the pond, however, seem to have little regard for such things, preferring instead a reality TV star who, we knew in advance of the election, stiffed workers for money he owed them, went bankrupt several times, bragged about sexually assaulting women, spoke of his daughter in sexual terms, and had ZERO political experience. Then there are all his ties to a longtime enemy, Russia, which we also knew in advance of the election. 

When it comes to which country is more mature, Germany or America, there is no question that the answer is Germany.