Halloween hissers are more expensive, but much softer and more attractive as feeders. Orange heads are my favorite, by far.
Regular hissers are slower to get started and you'll have quite the wait with that few, but treated like dubia, with things a bit on the dryer side, they do produce a lot. I get larger lots for cheapest on eBay. They have a higher fat content and are great for that reason, when you have larger chameleons, imports, or gravid females.
They are not so fatty as to avoid them, but the hard exoskeletons of the adults is quiet formidable and the legs are sharp and spiky. I feed the adults freshly killed, so they don't struggle and injure my chameleons with those legs.
They gutload easily. They also will climb on a branch in the chameleon's cage and are slower moving, less apt to stop, drop, run, and hide, though they will, if free ranged. They do need warm conditions to breed quickly. Giant or even standard lobster roaches breed quickly and are about an inch for the standards and 2" for the giants. They breed VERY quickly and make good staple feeders. They don't fly, but do climb.
Orange heads are my favorite for melleri and parsons, hands down, but the giant and standard lobsters are more versatile and will appeal to many chameleon sizes.
