This statement is correct. Both are different, Autodesk created this two programs with two different purposes in graphic design because Autodesk will incorporate this 2 programs in 1 software if they have the same purpose.
Yes, just like Adobe who has created multiple programs that do basically the same things:
Fireworks, Illustrator and Photoshop can all edit images; but each one has a niche. Where Dreamweaver, Flash and Fireworks can all create web pages; but each one uses a different web format.
This also applies with MS Office: you can make nice cards with Word but Publisher is better with that task.
This process used by companies is used to help bring the customer specific tools for their specific needs. (and it makes the companies more money.)