Attached Link: http://www.renderosity.com/viewed.ez?galleryid=839401&Start=1&Artist=falconperigot&ByArtist=Yes

I think it was simply an historical thing. Julien started with Deeper, then produced Baker when he'd got to grips with normal maps and baking textures. But the type of normap map differs too which is why if you get both you'll see there are two options in the shader tree. I used Deeper to generate and apply the detail to the coins in my money box image (see link).