Which is a better guard dog: German Sheperd or a Doberman?

Doberman.

I would say German Shepard.

A Doberman is faster, but a I think a German Shepherd is stronger. German Shepherds are more loyal than Dobermans and I think they have more of a natural instinct to protect. Plus, police use German Shepherds.

However, (just so you know), “Guard dogs” are not really meant to be pets. They need trained and experienced handlers.

I think it depends on what your looking for. Dobermans are widely considered the best guard dog for outdoors because it is a dog that will let you know from the get go that he’ll hurt you if you enter his “master’s” domain. Most often, those who would do harm are frightened away before a break-in because the dog makes it very clear that it is there, and no smart burglar would take on a dog that size while it’s warning them off! They also tend to attach to a single owner, rather than a family, though they are friendly towards people their master approves of. German Shepherds are one of the most popular breeds in America because of their adaptability to almost any environment. They deal equally well with apartments and houses, & can be an indoor or outdoor dog. I had a German Shepard, and she was fiercely loyal, and extremely protective. They are very affectionate of owners, are curious of owner’s friends, and apprehensive of strangers. As a warning, a German Shepherd, for the most part, will not warn a potential attacker before they bite. If someone makes a threatening move towards you, it is highly likely to bite first and ask questions later. A German Shepherd, in my opinion, are naturally better guard dogs because they are more loyal than Dobies & they have more of a natural urge to protect. Both are great dogs though

I have a German shepherd and he is a very good guard dog.

They are both good if they are trained.