Yes, there is a big differences between Pages-Viewed and Hits at a website.
Hits are everything accessed by the server from a websurfer.
Hits are images, active server pages, text files, sound files, and everything else accessible to a surfer. These are usually the substance of a site's bragging rights about getting 3 million hits a day when they have two hundred images on their site template. Pages-viewed are single html or text files that are opened off the server. Pages-viewed are a more accurate way of seeing how many websurfer have visited the website. Both Hits and Pages are very important information, hits stroke the ego of a webpage designer or a webpage owner.