Comparing Rats and Water Voles

In summary: rats have prominent ears, while voles' ears are small and tucked away.

Rats' noses are pink, where water voles' are black.

Rats' feet are while and water voles' are black.

Rats' fur tends towards greyish brown, whereas water voles' fur is richer brown.

Rats' tails are naked, long and pink, while water voles' tails are brown, medium-length, and covered in fur.