[Theme: EvoLve] Paid vs. Free versions

My main question is what is the real difference between the free Evolve template hosted by WordPress and the $50 paid version. I can’t find any real list of the benefits of purchasing the full version. It doesn’t have a comparison chart listed online of any kind. Perhaps there are standard differences between free and paid themes of the same name? I’m new to a lot of the wordpress development, but my office is pushing for the paid version of the app and they want to know the benefits before purchasing. I can’t find those.

this is my website. evmedreview.com