To me, Google's headquarters are shaped more like arrows pointing inwards and around, compared to Apple's singular Loop.
When you compare this, obviously aesthetically it gives and impression, but what about for the people actually /working/ there? How do people move about in those spaces?
I'm an apple lover at heart, but I'm not going to lie about wanting to work in an office-type environment similar to that of Google's. Utilising different zones and 'break-out' spaces, categorising and theming different floors and offices with unique features to inspire the individuals inside is fundamental to keeping creative people on-the-go. There is Architecture in that, it's new, it's forward thinking and it's really radical.
Apple's however, its secretive and, though I know some of the mentioned above elements may be true (just no-one has seen much of the inside spaces, there never really has been a need to.) How do people move from one side to the other? What "clusters" fit together? Is there a hierarchy here? The team working on the design here were definitely focusing on making a piece which is timeless and iconic -- much like all of Apple's products and ecosystem in fact.
Stripping the companies from the buildings, though, if you do a little more research into the way these spaces have been made (regardless of what actual products they're trying to achieve are) the work environments inspire totally different things from their users and are inspiring and displaying very different approaches to work. This is what's fascinating to me.