There's quite a few differences. Basically, JomSocial focuses on the 'social' aspects on your site with Facebook integration added on, while JFBConnect focuses on Facebook integration solely. There are many user's who are very happy with JomSocial's Facebook integration, but for extra features and capabilities, that's where we shine.
I've linked another Pre-Sales post below which goes into depth quite a bit more as to the differences. I hope this helps, but if you have other questions, just let us know:
http://www.sourcecoast.com/forums/jfbco … p=1#p11357
The big problem I see when I use JomSocial's Facebook integration is
1.Members are hard to login with this integration. maybe they have to try login two or three times when they want to login and sometime they cannot. The pop up will disappear after they try to login but it's not success.
2.It's not remember login. They have to login every time when they come to my site.
Is there any problem with jfbconnect?
Yup. Those are definitely problems that are mentioned frequently with JomSocial's integration. Some people can live with it. Others choose to upgrade to JFBConnect. Specifically:
1) No, we don't have this issue, and if you run into it for some reason on your site (it's not something we ever hear of), we'd help you fix it so it doesn't happen again.
2) We have a auto-login functionality, where if the user is logged into Facebook, it will log them into your site automatically (if they already logged in through Facebook previously).
Hope that helps answer your question. If you're still on the fence, I'd recommend you read our reviews on the JED, linked below, and keep in mind that we have a 30-day money back guarantee.
http://extensions.joomla.org/extensions … 215#action
Best of luck,