Yes, basically. They're sort of like doubles, I guess you could say. They each evolve with items named specifically after them, and they're similar as well. Not exactly in design, but in other aspects. Their typing is different, however, but you've probably realized that even before you asked this question. But in general, they are very similar—I wouldn't call them the same because obviously even Pokémon of the same species aren't the same. Very similar, however, is a yes.
