From my understanding "projection templates" are made to make rigging easier.
Eg, you've worked hard on rigging a skirt for Dawn, you plan on making more skits for Dawn so you use the first one as a projection template so it acts kind of like a shortcut to rig your other skirts. I hope that makes sense?
And Auto-fit uses a "clone", I kind of think of it as a "shape" eg: make a V4 clone to use with Dawn by making V4 look exactly like Dawn (size, shape, everything), the clone fools the clothing so it thinks that its going on V4 but "stretches" it to fit Dawn) this is not quite right but hopefully gives you the picture of what's happening.
Eg, you've worked hard on rigging a skirt for Dawn, you plan on making more skits for Dawn so you use the first one as a projection template so it acts kind of like a shortcut to rig your other skirts. I hope that makes sense?
And Auto-fit uses a "clone", I kind of think of it as a "shape" eg: make a V4 clone to use with Dawn by making V4 look exactly like Dawn (size, shape, everything), the clone fools the clothing so it thinks that its going on V4 but "stretches" it to fit Dawn) this is not quite right but hopefully gives you the picture of what's happening.