It does depend how you look at it, SITN and yes there is a difference and it may well not be outright 'aggression'.
Some breeds are more likely, IMO, to give those warning/guarding/ defensive growls than others. Can be useful but can also be a problem.
The fact that my working lab growls as people approach could be seen as a good thing and living where we live can be a 'comfort' at times. And I have to admit that when my daughter goes out walking on her own, it is the lab. that I tell her to take and not the Flattie. However, I would probably overall, sooner that she didn't have that trait when I'm walking through towns/villages. Some people don't see it as a positive when we're out in that situation and it could get you into difficult situations if she wasn't well trained/obedient.
Depends where you live and what you see as desirable in a dog .... particularly a dog that is used as a companion.