hunting dogs are way more affectionate, social and loyal than shepherds, thus more family friendly. also more intelligent. take viszlas for example. these dogs, like most hunting dogs, require rigorous exercise. otherwise they might be hyperactive. regardless, they are some of the most up and personal dogs you can come across: they want to hug, cuddle and kiss their owners all the time. these are ideal for children.
then you have weimaraners. they are called the dogs with the human brain for a reason, these dogs are similarly loving and affectionate to viszlas, but not quite as bubbly and crazy. they are basically the more royal version.
shepherds are bigger than hunting dogs and clumsier. they are working dogs, bred more for the exact purpose their name suggests: farm dogs. they are also excellent guardians. as such, they are very protective, also generally reserved or even hostile to strangers.
they share some similarities to hunting dogs, but they are less intelligent, bigger, more robust and less "friendly.
hunting dogs on the other hand generally have little to no purpose as protection dogs. they were bred to serve humans only. I have met many hunting dogs and shepherds in my life, shepherds would often bark or be threatening / territorial, hunting dogs on the other hand were always too busy runnign around smelling stuff and enjoying nature, and they would always greet any stranger (including me) as if I was one of their own.
so, to summarize:
hunting dogs: less robust, smaller, maybe less muscular too, a thin, easy to maintain coating, more friendly, more social around humans, more intelligent.
your second point has nothing to do with loyalty at all: set a hunting dog lose in a forest, its strong senses will kick in and take over, these dogs have legendary noses and a strong drive to smell out and hunt game and thats what they do, and its so strong that they MIGHT not listen to their owner at all times when they are spaced out, but guess what: at the end of the day, they will always return to their owners. ALWAYS.