@Abbtt: All content and settings will be same and many added settings that you might feel comfortable working with. If you have worked with Custom CSS then that will not be valid for pro version much. You need to add different custom css. But I am here to help you out if you need any custom css.
So, in general most of the things will be carry over but few will not as Simple Catch Pro theme structure is different. It is build in HTML5, CSS3 and Responsive Design.