Amazon is in many ways a more interesting company than google. Amazon's offerings are becoming more and more diversified and they're industry leaders in more than one area. And they are making a strong push at maintaining growth/expansion.

Amazon has a strong history of expanding their business and building new highly valuable products with staying power. Google has only expanded a little in terms of actual functional products, most of their additions have been via acquisitions, and they have not done well at monetizing or even supporting many of their new product offerings. Google is primarily search + backbone ISP, that's where almost all of their revenue comes from, everything else falls into a tiny "other" category. Indicative of their utter inability to effectively spinoff new products and high revenue businesses.

The only downside is that the work environment is more than a little dysfunctional.