RFBee vs Xbee

Hi guys, big question, which is the difference between Xbee and RFBee module? I found a couple of tutorials how to program xbee and this library http://code.google.com/p/xbee-arduino/ that looks great. Is there out anything else for RFBee? Thanks

Pretty much everybody knows what an XBee is. I've never heard of an RFBee, so, you'll need to post a link to this device.

take a look here http://www.seeedstudio.com/depot/rfbee-v11-wireless-arduino-compatible-node-p-614.html thx

Anyway the top question is: this board http://www.cooking-hacks.com/index.php/relay-shield.html is compatible with zigbee module? as you can see there is a socket for it but into the doc rfbee is mentioned but not zigbee. thanks