While there is little behavior difference between Web Parts on a wiki page and Web Parts on a Web Part page, let’s build a Web Part page to illustrate what the differences are.
Wiki pages are most often stored in the site pages library of a Microsoft SharePoint Foundation site, Web Part pages can be built in a document library, regardless of the library name.
Web Part pages are found in all but the Team Site template as the de facto page type and have a few interesting characteristics that make them different in behavior from their wiki page counterparts, such as:
No version control
No area for freeform content (graphics, images, and so on)
A very rigid structure that cannot be changed quickly—once a page layout is chosen, ...