For example, I can add a 'Like' widget to my homepage where my domain name is the thing being liked (eg. a customer clicks 'Like' and their news feed shows something like "Joe Bloggs likes www.example.com").
Or, I can add a 'Like' widget where my Facebook page itself is being liked (eg. the customer clicks 'Like' and their news feed shows "Joe Bloggs likes Example.com" and links through to www.facebook.com/example.com
Is one of these better in terms of SEO impact, or the results on facebook? Any raw opinions or opinions backed by facts?