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"Amidst all the talk about data portability and net identity, all that end users want to know is: how can I use this, and is it any good? Now both Google Friend Connect and Facebook Connect are open to everyone; we've looked into these two services to see what they offer and which one is easier to use. \nSo, what's the main difference here?\nIn the simplest of terms, both Google Friend Connect and Facebook Connect let you create applications on your website that allow your visitors to interact with the site and their friends by logging in with their Google, Facebook, or OpenID credentials. \nThe key difference between the two services is the fact that Facebook is one social network, while Google Friend Connect is open to any site, service or social network that uses OpenID for identification. For example, with Google Friend Connect your visitors can log in using their Gmail credentials, meaning that they don't really have to be a part of any (strictly defined) social network at all.  Facebook Connect, on the other hand, is useless to anyone who's not a Facebook user. \nAvailable widgets\nLet's say you want to add either Google Friend Connect or Facebook Connect functionality to your web site or a blog. What widgets are there at your disposal? Google calls their widgets \"gadgets,\" and there's already a wide assortment at your disposal, with members of the community constantly adding more. They aren't all Friend Connect ready, though; you can currently only choose from a small selection. \nAs far as Facebook Connect goes, you must create your own application, which is not that easy (see below). Logic tells me that there must be a gallery of apps you can readily add to your site, but I don't see one; if I'm mistaken here, please correct me in the comments. \n\n\n\n\nEase of use\nIf you're a web site owner, there's a significant difference here. Both services require you to add some snippets of code to your site; however, adding Facebook Connect apps is a much more convoluted process. In short, the entire process is aimed at developers, not casual users, and it will scare away anyone without adequate technological knowledge.  \nThis is a big, and important difference. Anyone can add Google Friend Connect to their site; as far as Facebook Connect goes, I'm convinced that many users will find the process too complicated. \nOn the user end of the equation, ease of use is nearly equal: a site which has either Google Friend Connect or Facebook Connect enabled will have a form that lets you login with your OpenID or Facebook credentials, and the usability from there depends on the individual widgets and applications.\n\n\n\n\nTwo way communication\nThere's one other subtle difference between Google Friend Connect and Facebook Connect: the latter is much more about two-way communication than the former. A Facebook Connect application can send your activities back to Facebook; Google Friend Connect has no such central place, although in theory it can have many (e.i. all the social networks that support OpenID). \nTherefore, I reckon that in general, Facebook Connect will primarily be interesting to bigger sites who will want to engage Facebook's huge audience. Google Friend Connect will also be used by smaller sites who'll simply want to add a fun widget to their site. \nUser base\nIf you look at these two services from an identity perspective, deciding which is better can be tricky. Yes, Facebook is huge, but Gmail and all OpenID supporters put together are bigger. Will Facebookers be more willing to log in with their credentials into a third party site than Gmail users? It's hard to say, but in general, my opinion is that FC and GFC are tied with this regard. \nConclusion\nSo, there you go: although seemingly very similar services, Google Friend Connect is (currently) aimed at a wider user base, while Facebook Connect is (currently) for developers only. There's a difference in focus, too; Facebook Connect is more about bringing data back to Facebook, while Google Friend Connect, lacks a central place to bring back data to. \nIf you've got anything to add, or you've tried one of these two services and want to share your experience, we'd like to hear your comments!\nImage courtesy of iStockPhoto, bns124"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2008/12/05/facebook-connect-vs-google-friend-connect/>