Xtreme 5 vs. Web Designer

I just made my first web page in Xtreme (pretty nice and easy modifying a template) and I consider buying the Web Designer package. I'm not sure I need it though, what do I get that I don't already have in Xtreme 5?

I make simple music/band/hobby pages like this and this

thanks

JimR

XWD is a cut-down version of Xtreme - you don't need it.