The link below is to an article that looks at the pros and cons of both sites. I’m a Goodreads fan, so I’m happy where I am. I have looked at other sites, including LibraryThing, but settled on Goodreads in the end.

For part one of the series on Goodreads Vs LibraryThings, visit:
http://bookriot.com/2012/07/31/goodreads-v-librarything-part-one/