2.The diet of a mole is different from a vole. A mole is a carnivore that eats worms, insects, ants, and other animals while voles are herbivores that eat the plants on the ground. 3.The mole is also physically larger than the vole. A typical measurement of a mole is 5 – 8″ long while the vole is only 3 – 5″ long.