The Social Login plugins on its own does what it’s supposed to. Provide login options to your users to your website with 3rd party services like Facebook, Twitter etc.
This integration with PeepSo goes beyond just that. It also allows importing some user profile information like: Name, Last Name, Birthdate and avatar. Right now this info is taken only from Facebook, but within the next one or two releases we should be able to add that to other providers as well.
Social Login plugin comes with its own widget which you can place anywhere. The integration with PeepSo allows displaying social login options within PeepSo itself. PeepSo Profile Widget, Landing Page and Registration.