It's highly possible the two will look different as there is no standard of look, build, and temperament for this type of dog. I was at the vet with my dog when a lady came in with two puggles. They looked completely different from each other. They may not have come from the same litter but, as I said, there is no standard. Compare that to someone who walks in with two chocolate labs. Odds are, they will both be a large dog, dark coat, and friendly dogs.