This ^^Calmer? I'm not sure where you heard that. Dutch Shepherds are predominantly higher energy and drive than majority of the GSDs you'd ever meet. As a general rule of thumb, the Dutch and Malinois tend to be a lot more handler sensitive than GSDs.
I've been searching up "Dutch Shepherd temperament", and half the sites say that they're calmer, less energetic, friendlier, just as easy to train. The only downside I found was that they may think they're in charge if the handler doesn't make it clear.This ^^
Dutch Shepard’s are much harder to train, their energy levels are through the roof, and need to work constantly to stay happy and nondestructive. Little to no off switch for home life until much later in life than a GSD.