It's the same guy; being Keith Ferguson. He's simply getting better with the voice, and developing a better way of providing the voice of Blooregard Q. Kazoo. That's how it is. Also, as for Mac, Sean Marquette is almost 19. Anyone that can still do a great job providing the voice for everyone's favorite 8-year-old boy gets an A+, IMO.
I believe both gentlemen are doing a great job.
