Hi,
Thank your for your interest.
1. The premium version allows to set a separate URL for each social button. On other side, the free version allows to set only common URL for all the buttons.
2. The premium version provides more social buttons. For example: facebook share, twitter follow and others.
3. The free version comes only with one default theme. The premium – with 3 themes.
4. The premium supports loading content via ajax (dynamicaly) after unlocking. It’s usefully, for example, to hide discount codes.
5. And many other minor differences…
You can download the free version and activate the full-featured trial for 7 days to test the plugin.
Let me know if you need more my help.
Regards, Paul