XDDD, aww man, I saw this and I just thought, OMG!
XD, yeah, as Dai explained, they both have a Plot, you see:
RPG=Role Play Game
Both the same, not at all different except for the 'G' on the end of RPG. XD
They are refered to as RP's here at PC, and If I'm not mistaken, there is a Rule thread here and they are refered to as RPG back at SPPF...and whaddya know! They have rules there too, XD
*Goes of giggling*