Phones have become more and more like computers over those 6 years (and this trend was obvious before that). Apple isn't a newcomer to the computer market (and their earlier history is serving them well - many of the patents they're using aggressively come from the 90s).

On the other hand, Google is a relative newcomer and it has been an issue for them (so much so that they eventually decided to buy one of the older players for their patents).