How do hominids in the group Australopithecus differ from those in the group Homo?

Question

how do hominids in the group Australopithecus differ from those in the group Homo?

Answer 1

Australopithecus is a human ancestor that is still considered a primate.  Members of Homo were human ancestors that are considered human and not primate.

Answer 2

Australopithecus were primarily vegetation eaters, and had not really begun to use tools the way Homo hablis (1st hominin) did!

Most of the "homo" family were omniverous, and if not all-out hunters, at least scavengers of meat, which is what contributed to their sizable growth, not only the brain, but the entire body as well!

Answer 3

In general, they have smaller brains but the exception is Homo floresiensis or the hobbit.