Hi,
Thanks for your question. We don’t have a comparison chart yet – maybe it’s a good idea to generate one to simplify exposing the differences. There are quite may of them now, and far more are coming.
But for example the Pro version allows you to count other types of content besides posts or pages allowing you to get more reliable data on the number of page views. It also makes it possible to significantly speed up and optimize the resources required for the operation of the plugin (Fast Ajax counter mode, Object Cache support).
In addition, it includes Reports, which are completely unavailable in the basic version – i.e. the possibility to obtain detailed information on the number of page views in a given time period, or on the most popular content for a day, month, year or any other period. It enables the export of generated reports to CSV or XML files, etc.
Actually, when you have the basic version, you can see which options are not available, which means that they are only activated in the Pro version.