Yes, user_likes will give you access to both.
You can access external likes as you wish through the Graph API endpoint /me/likes, as long as they're not articles. Objects with type "article" do not represent real-world objects and as such, we don't provide on a person's profile. We mention this (albeit obscurely) on the Open Graph documentation page: https://developers.facebook.com/docs/opengraph/#types
So if you go to my fake movie object page at
http://fbsb.hoodlu.ms/so_7436857/video2.html
and click like, that will show up when you access your likes on https://graph.facebook.com/me/likes.
Try it using the Graph API explorer:
https://developers.facebook.com/tools/explorer/?method=GET&path=me%2Flikes
If you want the URLs that someone has liked, use this FQL query:
SELECT url FROM url_like WHERE user_id = me()
More information is available at https://developers.facebook.com/docs/reference/fql/url_like/.
If you want to access the likes from a post, photo, video, etc. you'll need to use the like and stream FQL tables. To just pull out the likes (of posts/photos/videos) for the current user:
SELECT user_id, object_id, post_id FROM like WHERE user_id=me()
From there, you would query the stream table for the post to get more information.
like table documentation: https://developers.facebook.com/docs/reference/fql/like/.
stream table documentation: https://developers.facebook.com/docs/reference/fql/stream/
