Facebook, LinkedIn 'Unique': Gurley

Both Facebook and LinkedIn have created a rare "global network effect," Benchmark Capital general partner Bill Gurley said Tuesday on CNBC.

"I don't think anything about how LinkedIn monetizes is threatened by mobile. The transition from one platform to the other is seamless for them, whereas it's a little bit tougher for Facebook," he said.

"Both companies, however, have something very unique," Gurley added. "They have a global network effect that crosses borders. There are very few businesses where you have that kind of network effect, and they create a pseudo-monopoly."

On "Fast Money," Gurley revealed one reason he remained bullish on both companies.

"I was always taught way back in my days on Wall Street, 'You never short a leader,' and so I think it would be hard to get on the negative side of either stock," he said.

AlphaOne Capital Partners CIO Dan Niles was also positive on Facebook, citing the social media giant's 1 billion users and the introduction of social search and e-commerce with its gifting feature.

"I think that's the real opportunity is that they add revenue streams, just like Apple did in its early days and just like Google did in its early days.

OptionMonster's Pete Najarian, who owns shares of Facebook, said that the valuation of both stocks appeared "extreme," but he remained more bullish on one.

"I actually think in front of them right now, Facebook has a much better opportunity … to potentially double," he said.

Trader disclosure: On Feb. 12, 2013, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Fast Money" traders: Dan Niles has positions in FB; Dan Niles has positions in INTC; Dan Niles has positions in MSFT; Dan Niles has positions in AAPL; Dan Niles has positions in QCOM; Dan Niles has positions in EBAY; Dan Niles has positions in CSCO; Dan Niles has positions in JNPR; Dan Niles has positions in CIEN; Dan Niles has positions in FNSR; Dan Niles has positions in AMZN; Dan Niles has positions in ONNN; Dan Niles has positions in NXPI; Pete Najarian is long AAPL; Pete Najarian is long AAPL CALLS; Pete Najarian is long JPM CALLS; Pete Najarian is long BAC CALLS; Pete Najarian is long MS CALLS; Pete Najarian is long XLF CALLS; Pete Najarian is long YHOO CALLS; Pete Najarian is long BBRY; Pete Najarian is long BBRY CALLS; Pete Najarian is long SBUX; Pete Najarian is long FB; Pete Najarian is long MSFT; Pete Najarian is long DELL; Stephen Weiss is long BAC; Stephen Weiss is long C; Stephen Weiss is long QCOM; Stephen Weiss is long TBF; Mike Murphy is long AAPL; Mike Murphy is long GS; Mike Murphy is long FB.