1
Google +1 Button is leading in Top 100K Sites, Top 1M Sites and The Entire Web.
2
Facebook Social Graph is leading in Top 10K Sites.
1
Google +1 Button has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Science & Education, Travel & Tourism and 19 other categories.
2
Facebook Social Graph is leading in Community & Society.
1
Google +1 Button is leading in most countries, including Japan, France, Italy, Russia and 152 other countries.
2
Facebook Social Graph is leading in United States, Australia, New Zealand, Finland and 4 other countries.