DAZ figures are usually meant to cover a wide range of more or less humanoid shapes.

That usually doesn't include horns, tails, hooves etc (Even though they can be easily "welded" to Genesis), but digitigrade feet, paws, four fingered hands, cyclope eyes, animal heads are all easily possible.

But the most important "smart feature" is a full set of anatomical detail built right into the mesh: Musculature, tendons, bone detail like kneecaps, shoulderblades, ellbows, etc. This is created the same way I built my blue cube: Anticipating the shape(s) the figure needs to morph into, and build the topology accordingly.

That's why Vicky-6 can be the exact same mesh as Mike-6 even though Mike has lots more musculature, and both can be children or bodybuilders or morbidely obese or Orks or Aegyptian gods or aliens.

That's the kind of detail that makes them easy to morph and realistic looking and that's the kind of "built in" detail created by a purpose built topology.

DAZ meshes have lots of this detail, and Genesis-2 simply is the latest (and most perfect) example.

Other human figures either have almost none of that or at least considerably less of that kind of detail. The result is that, try as you might, you never get as many different realistic shapes out of them than what you can get out of a DAZ mesh.

It simply is a fact that the more time and effort you put into building the topology, the more versatility and realism you can get out afterwards. Humans are complex shapes, so the more complex (Not dense !) the mesh is to represent their form, the better.

If Poser could use figures with 10 million polygons, we wouldn't have to worry about topology at all. With 10 million polygons, you can sculpt anything as detailed as you wish.

But Poser can't do that, so we have to use the smartest, the most complex meshes we can find if we want the best results possible.

And that, until someone builds an even "smarter" mesh, is currently Genesis-2.