If you stood me in a costume next to a computer graphic of the same-looking character, I think there would be a difference. And many movie fans I've spoken to would rather see an actor in a costume than CG.
“What happens is that your wretched memory remembers the words and forgets what's behind them.”
“I have funny bones. If there's ever any kind of tension, I'll always be the one to try and be funny to loosen things up.”