These tiny, regal-looking long-haired breeds may be hard to tell apart, but they have a few identifiable differences beyond belonging to different breed groups. For one, the Shih tzu, part of the AKC’s Toy Group, has a more flowy coat, whereas the Non-Sporting Group’s Lhasa has a heavier, more straight coat. But their personalities are also a little different. Unlike Shih tzu, Lhasas are more wary of and aloof around strangers.