Carlson, don't ask, don't tell :p
Mike, the main things are size, speed, and the lats drop egg cases, dubia suck them back up. Lats, the males can fly. Dubia the males flutter when falling.
Looks like you need a substrate for the lats (I'm guessing for the egg cases)
I'm still reading up on them. I'm only wanting the lats for the smaller babies.