I only have dubia's but from my experience I know I like them because they cannot jump/climb/fly out of their bin and they are alot slower than some of their relatives not to mention they need heat to reproduce also unlike some of their sleazier relatives.
I have discoids, thousands of them. They are ok i guess. They dont smell, but they can climb the wall of a rubbermaid container if you dont buy the clear kind! I made that mistake, and my wife was really mad!
They eat about anything and are really hard to kill.
I have become allergic to them tho. I have to be very careful when picking out the nymphs to feed that I dont get too many on my skin. If i do, then its a sneezing fit for half an hour.
My favourite as a feeder is the Turk. mostly because my chameleons like them best. They also dont climb, making them easy to keep. They're fast though. I cup feed, and watch to ensure they get eaten right away, especially if Im feeding off female roaches.
I find dubias dont move much, and that makes my chameleons less interested in them. baby chameleons seem to prefer Turks and Hissers nymphs to dubia nymphs.
I love my hissers, but they do climb and the full size adults are a bit too big for the chameleons (and I kinda get attached to my hissers, so they are mostly pets rather than feeders).