Should I continue with Google’s in person hiring process if I already signed an offer with Waymo?

Google wants me to do a second round in person interview in Bay Area or New York campus. I already have a new grad offer from Waymo starting in about a month. Should I: 1. Continue with Google hiring

Google wants me to do a second round in person interview in Bay Area or New York campus. I already have a new grad offer from Waymo starting in about a month. Should I: 1. Continue with Google hiring process and fly to New York or Bay Area for onsite interview. Cons: Potentially reneging Waymo’s offer if I end up taking Google’s offer. Giving up Waymo’s private stocks. Waste Google’s time and money for the onsite interview process. 2. Tell Google I already have an offer and stop the interview process, saving time and money. Cons: Giving up potential opportunities to maximize / negotiate compensation. I enjoyed working at Waymo during my internship and I like the technical domain. Please offer your insights on how I should proceed. Thank you. Update: I told Google I will be joining Alphabet and withdrew from the process.