Google pays the same pre-tax in Seattle as in the Bay Area, at Bay Area rates in each case. So it's also between companies even within the Seattle context.
(Or at least that's the official line. I haven't examined any de facto pre-tax pay disparities between the two locations. But at least they don't adjust comp when one transfers between those locations, or between either of them and NYC; whereas they do for relos those areas and significantly cheaper areas.)
Source: personal memories of policies from 3-5 years ago, which could have changed but probably haven't.
(Or at least that's the official line. I haven't examined any de facto pre-tax pay disparities between the two locations. But at least they don't adjust comp when one transfers between those locations, or between either of them and NYC; whereas they do for relos those areas and significantly cheaper areas.)
Source: personal memories of policies from 3-5 years ago, which could have changed but probably haven't.