Is there a functional difference between the "google +1" button and the "G+"? Has there been any conclusive research done regarding their affect on SEO?

[djmay]

Google used to offer a +1 button but that seems to have gone away in favor of the new google +1 button or the G+ buttons.  I am trying to determine which button I should add to pages on our site but since I am most importantly doing it for SEO impact, i want to make sure I add the correct button...if it matters.  Thanks

[DennisSeymour]

It doesn't matter.

PS. If I really had to pick a way for G+ to really work for SEO, it's getting people to actually share it instead of just +1s.

[MonicaOConnor]

If you have a lot of people in your circles, the +1s they have given can have some affect on the search results you see when you are signed into Gmal. It is part of how Google personalizes your search results. There truly isn't a huge difference, but you could see a different result if you are signed in as opposed to not being signed in.