Google doesn't generally care about near-IPO companies unless they're decacorns (and still apply a discount to the competing offer's equity). Google comp only lags behind Netflix for: a) Non-staff levels b) Candidates that don't have competing offers.

It's not unusual to see a huge pay discrepancy based on your ability to negotiate. It also depends on what ladder you're applying to (i.e. you can't compare a Solutions engineer comp at Google to a SWE at some other company).