Moles are about the size of a fat chipmunk, blind, live underground, have a nose that looks like a stubby octopus, and make raised tunnels and mounds of dirt in your yard and eat grubs and earthworms. Voles are about the size of a field mouse, have eyes, and eat seeds and stuff in your yard. Voles make the little hollow tunnels in the grass that you see when the snow melts. As forge stated, they will also eat the tender roots and stuff around ornamental shrubs, flowers, and such.