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| The current logo, which has been in use since December 2012 |
The new favicon better resembles the current +Google+ logo which has been in use since December 2012. The favicon is a smaller version of the Google+ for Android app icon, which you could already see on the Google+ widgets on websites (see ours on the homepage) and is rolling out to everyone on the website.
Check out the comparison below:
Old
New (in 16, 32, 64px sizes)
So which one do you prefer? The old or the new one?