Unlike the previous Like box that carried too much Facebook branding, the new Facebook Page plugin is cleaner without any branding. You can now display the cover photo of your Facebook Page inside the Like box. You can also add a “Call to Action” button that will redirect people to your email newsletter or prompt them to install your mobile app and so on.
The other difference that you can now only display a single row of fan pictures inside the Page Plugin. Why does this matter? The pile shows profile pictures of mutual friends who have liked your Facebook Page and thus, when a casual visitor sees a familiar face inside that pile, it is likely to increase their interest in your website.
What you see here are a list of customization options now available inside the Facebook Page plugin. You can choose to have a simple Like box with just your logo and like button or you can have a complete box with cover photos as well.