The gap is insane even between the FAANGs, someone got an offer at $450 total comp (inc grants over five years) at one and the other couldn't even break 225/yr total. Something is gonna have to give.
Is important to reflect on compensation gaps among top 10 companies in the US over time and the positions that they valued most (whether fair to value them that way or not). That will tell the story of if there is anything to give.