Figures for my company are spot on, so I assume that they are correct for other ones as well.
Usually base salary for a given level is set (you can see that majority of entries have very similar base salary if you remove outliers).
Bonus is usually preset as % of base salary and therefore will be same/similar for most people.
What could make difference are RSUs. If you are coming from another FAANG or startup and leaving behind lot of unvested stock, you might get that matched. Or if you have other offers they will prefer to increase RSUs rather than base salary. Every year you then get refresher RSUs which are quite significant (as big as your base salary but spread over 4 years).