This makes me laugh, because when Marinette first transformed she was not at all prepared for it. But when Adrien first transformed, he was totally into it! He went through the same motions he went through in every other episode!
Hawk moth is Mr Agreste. There are no two ways about it. They have the same voice actor, among other things. I know this was probably obvious to the majority, but some are still speculating. They would not use the same voice actor for a different character. Animators are seldom so crude.