Comment by jarjoura
Can confirm. I saw a flood of ex-Amazonians come to Meta in the late 2010s. Not sure I interpreted their comparisons of Meta being more cut-throat, but it did seem like Amazon had way more intense politics with opaque decision making that hurt morale. Kind of seemed like they paid less for the same amount of stress but from different reasons.
I think Meta overall has better people and more homogeneous in the quality, it makes coasting more difficult and leads to a grinding culture.
Amazon on the other hand, is toxic but has corners, so the coasting opportunities exist and some of the orgs are incredibly bloated with not too much to do.