Well let's see: Google bought Motorola to use it as a patent hammer.
Microsoft has a long history of strategically settling lawsuits with patent and IP trolls (remember SCO's lawsuit against Linux? Funded by Microsoft paying them to license stuff that they could (a) easily have fought or (b) paid far less for; similarly Burst's lawsuit against Apple over QuickTime was funded by a Microsoft settlement).
I dont agree. Google refused to enter the patent war and was heavily bashed for years. They bought Morotola to use the patents to defend their partners. They are not using patents offensively, as far as I know.
Microsoft has a long history of strategically settling lawsuits with patent and IP trolls (remember SCO's lawsuit against Linux? Funded by Microsoft paying them to license stuff that they could (a) easily have fought or (b) paid far less for; similarly Burst's lawsuit against Apple over QuickTime was funded by a Microsoft settlement).