The main difference between a grasshopper and a cricket is that crickets tend to have long antennae, grasshoppers have short antennae. Crickets stridulate ("sing") by rubbing their wings together, while grasshoppers stridulate by rubbing their long hind legs against their wings. https://www.abchomeandcommercial.com/blog/grasshoppers-vs-crickets/ On top of that, crickets can't fly even though they have wings, while most grasshoppers can fly pretty well.