OpenGraph or Schema.org?

Question

Just wondering whether you guys out there are favouring the OpenGraph protocol following markup like:

Answer 1

rdfa(opengraph) and microdata(schema) cannot be used on same html page

"3) We’ll continue to support our existing rich snippets markup formats. If you’ve already done markup on your pages using microformats or RDFa, we’ll continue to support it. One caveat to watch out for: while it’s OK to use the new schema.org markup or continue to use existing microformats or RDFa markup, you should avoid mixing the formats together on the same web page, as this can confuse our parsers."

SRC: http://googlewebmastercentral.blogspot.in/2011/06/introducing-schemaorg-search-engines.html