I don’t think Facebook will ever catch up with Google. FB knows what everyone “likes” and can sell ads, but Google has equally good data on users and also sells ads. FB knows what people are talking about at any given moment while Google knows what people are interested in and searching for. Call this one even.
But for years, Google was buying dark fiber on the cheap after the dot com bust. They’ve created shipping container data centers conveniently located at many of the internet’s peering points. They’ve created their own servers for mammoth processing and storage capacity. They are 10 years ahead of FB in hardware and physical infrastructure.
Facebook is trendy and users could decide FB is no longer cool at the drop of a hat (though I admit it’s far stickier than that, considering they have years of my pictures and history in a timeline). Google, on the other hand, is building physical infrastructure in our country, stuff that people will rely on every day of their lives. It’s the ultimate toll road.
And that’s why Google’s market cap is 4X Facebook’s (and I didn’t even mention Android).