Bello,

I've never read a comparison between the Norton and the D'Activator.
Although, from their description they seem to have some in common:
Both are known for their great crunch. The DA has a lot of presence while the Norton is bright and "is really good for opening up the sound of mahogany set-neck guitars".

Well, I have a D'Activator. It's good, but it's a bit too hot and too compressed for me.