Oh wait you know wait I'm thinking of wax worms sorry. Waxworms are the fatty worm, that and mealworms. Regardless though, variety IS not a bad thing, I still offer other feeders, like sometimes my local shop gets hornworms in so I pick those up, waxworms from time to time, and silkworms my local store doesn't carry so I don't know much about them.
Out here in Oregon my options are basically crickets, dubias, hornworms if I'm lucky, waxworms and mealworms, of all those staples or treats dubias is my go-to so that's why I'm swearing by them right now. I've noticed an improvement in growth since switching to dubias, I can't speak to silkworms, sorry for the slight misnomer on my part.