Difficulty ranking (hardest to easiest): Google, Apple, Meta, Amazon. Google is generally considered the hardest FAANG interview.
Style differences: Google and Meta feel like "interviewing with a machine" because of rigorous standardization. Apple and Amazon feel more like "interviewing with humans."
Meta's questions often come directly from LeetCode. Google disguises problems to trick you. One ex-interviewer said: "Google is more likely to design questions as red herrings."