It seems like a very poor financial decision to turn down 300k from Google to make 150k + fairy dust money from a Startup. Even if the 300k is lower than what Google ought to be paying.
Lifetime? Not sure what you mean. Given that the vast majority of Startups fail and any equity you were granted would be worthless and even those that do payout are usually just getting you to parity to people who were at a FAANG over the same time frame I fail to see how a Startup would benefit. Even Resume wise, recruiters won't care that you worked at a startup that had a $100M exit but they definitely will if you worked at Google for 5 years.
