Fact is in 2007 when Android was announced with great fanfare and plenty of prognostications of imminent Apple demise, Google was a larger company by market capitalization than Apple. Apple blew past Google in 2009. Now after 3 years or so of Android 'success' Apple is now larger than Google by a $100 billion ( $318 b vs 197 b ).
Goog vs Aapl Growth since Android
You would have made little money if you bought into Google at Android's announcement, Goog is actually still under it's all time high. You would have tripled your money with Aapl if you had bought in at the iPhone announcement.
And it's not as if Aapl is overbought vs Goog as Goog's P.E at 25 is higher than Aapl's at 23.
Apple's Forward P.E is even lower at 15 vs Goog at 20
Google says that it hopes to earn $1 billion in mobile in a year.
Apple made $8.82 billion from iPhones alone last quarter announced in October. (That's not counting other iOS devices like iPads, iPod Touches or revenues from iADs, App Store, iTunes music, movies etc.) That $8.82 b wasn't even from the high earning Christmas quarter which is yet to be announced.
Apple is heading towards $40 billion or more a year in mobile.
(I understand the revenues are not directly comparable for the two companies as Apple produces the whole eco-system but I just wanted to point out the few facts above which seemingly is unfamiliar with many as the countless 'Apple is being killed by Android stories' out there attest).
I own both stocks.