OpenGraph Type Entity
11,752,843 websites

OpenGraph Type Entity is free to use

http://ogp.me

Open graph type entity tag

VS

X-UA-Compatible
11,141,235 websites

X-UA-Compatible is free to use

http://blogs.msdn.com/ie/archive/2008/06/10/introducing-ie-emulateie7.aspx

Allows a website to define how a page is rendered in Internet Explorer 8, allowing a website to decide to use IE7 style rendering over IE8 rendering.

Market Share by Top Websites

1 OpenGraph Type Entity is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, X-UA-Compatible is clearly lagging behind, losing to OpenGraph Type Entity in all segments.

Websites Categories

1 OpenGraph Type Entity has better usage coverage in more websites categories. Including Arts & Entertainment, Food & Drink, Games, Lifestyle and 14 other categories.

2 X-UA-Compatible is leading in Computers Electronics & Technology, Science & Education, Finance, Law & Government and 2 other categories.

Geography

1 OpenGraph Type Entity is leading in most countries, including United States, Japan, Germany, United Kingdom and 134 other countries.

2 X-UA-Compatible is leading in China, South Korea, Taiwan, Hong Kong and 24 other countries.