I've worked at some of the FANGs, including Amazon. As far as their standard workspace equipment goes (e.g. computers, desk, monitors, etc...), they seemed to be more or less at parity with the other companies. The workspaces used to be on the drab side, but they've taken to modernizing them with bright colors and lounge furniture in common areas that looks trendy but is damned uncomfortable. They don't really have any perks like high-quality micro-kitchens (except at subsidiaries and sites where those sorts of perks are standard locally), cafes, gyms, etc...

EDIT: I should mention that I'm pretty easy when it comes to things like computer hardware and desks. I just need a terminal, chair to sit in, plain old desk, and I'll be happy. I might not notice any differentiating factors other people find important...