It's normal, as both of them are sword-based fighting games. As they're going to appear around the same time, and both games have many features in common, I can understand people comparing them. I've sat down and played both and they're more different than I had expected. It's more a platform game with fighting elements in there. Those are the main features.
Shadows are important in the game as well.
Sometimes you don't see an enemy, but you can see its shadow on the wall, which can be quite frightening. Real physics are used in some puzzles as well. Enemy's AI is looking really good. It's great to see the differences between enemies and how they behave. The Traitor knights are quite intelligent.