Isn't that a little like saying Google is a copy and paste of Alta Vista?
BBSs, TheWell, Compuserve, Prodigy, AOL, TheGlobe, Geocities, Friendster, MySpace, Facebook, what's next? Fill in the blank I guess.
DMOZ, Yahoo, HotBot, WebCrawler, AllTheWeb, Excite, AltaVista, Lycos, Google, what's next? Too hard to tell.
Google was founded on principles in artificial intelligence and now has a good handle on how to implement portions of AI along with all the other things they're doing.
Facebook was founded by a guy who was a voyeur and called its users "dumb f*cks" for giving out personal information while rocking a biz card that said "I'm CEO, bitch!".
Big difference and big difference in revenue too.