Pretty sure salaries at large tech companies are way higher in places like London, Zurich or Amsterdam than in Warsaw or Prague for example. Berlin may be closer to the eastern countries.

It might help to discuss actual ranges instead of "intimate experience" so we can tell if your experience matches reality.

Zurich is probably in a league of its own. London next. But then it is quite similiar in Paris, Prague, Warsaw, Frankfurt, ...

I think Zurich is in a slightly different league than London or Amsterdam in that regard but especially if you go down to the median and below (low taxes are helpful as well)