Both are fine. yes crickets are a bit more nutritious, mostly because they are less fatty. But they also seem to hold more in their stomachs, so fresh gutload is more easily transferred. Supers live a great deal longer than crickets, and grow more slowly, thus should need to eat less all at once quickly - but it many only appear thta they eat less (are you taking into consideration how much of the substrate they are eating (usually this is a bedding of bran or oats)?).
pssh - supers dont bite any more than crickets, and both insects have chinton.