There are several differences between grasshoppers and crickets:Chirping Style: Crickets make their chirping sounds by rubbing their comb-like wings together. Grasshoppers rub their legs on their wings to make a similar, though harsher, sound. Antennae: Crickets have long and willowy antennae.Grasshoppers have shorter antennae. Activity: Crickets are active at night, being nocturnal. Grasshoppers are active during the day, being diurnal. Diet: Crickets are mainly omnivores (some are exclusively herbivores though), so they’ll eat almost anything, from a decaying animal carcass to a tasty leaf. Grasshoppers are mainly herbivores, but some species are omnivores.