Not a difference in kind. That could be microevolution as usual or one designer copying another, but they have the same body parts and the same basic sort of plan. A better example would be ducks and penguins, again same basic body parts and actually the same basic plan for life if you view what the penguin does as "flying" through water.
Not a difference in kind.
Yet frogs are vastly different to toads. Far more different than say chimpanzees and gorillas. Do you think that chimps and gorillas are the same kind? What about chimps, gorillas, baboons, gibbons, and orangutans?