That's the case with Neapolitan Mastiffs and Cane Corsi. At first glance, these Italian breeds might look identical, but one fundamental way to tell them apart is their skin. Neapolitan Mastiffs have adorable wrinkles all over their bodies, while Cane Corsi have smooth, tight skin. These breeds may share some similarities in size and color but differ in personality, energy levels, and exercise needs. So the next time you come across a big, beautiful dog and think it's a Cane Corso or Neapolitan Mastiff, remember to check their skin for those telltale folds.