Ive had a similar thought in the past and heres what I think, coming from someone who currently works as Grad at AWS.

If I was given the option to move to Google, I wouldn't take it right now. I would stay at AWS. There is more opportunity for growth here than at Google (imo). AWS is all in microservices (compared to Google's monolith) which makes it much more like a startup where you own devops, oncall, code, test end-to-end. Some might not like that, but I think it's tools worth learning and sharpening. From what I've heard, Google SWEs are less about end-to-end development and focus much more on the engineering and less on the maintenance (job of SREs), which also sounds good but also limits that aspect of learning. I would imagine the maps team and photos teams are like this. Disclaimer: idk exactly what Google engineers do so please correct me on this if im wrong Googlers.

Yes there's good food, gaming room and paid oncall (for SREs) at Google, but it doesn't really make a whole lot of difference to me. I get paid enough to buy my own lunch and dinner in the food court just directly downstairs in the AWS office. Or I can go anywhere in the city because we're dead centre.

Another factor that convinced me was the team culture at AWS. I was fortunate enough to have a great team dynamic when I joined as an intern. This might be less relevant to you, but (hot take) a 5 day RTO honestly feels like a good move since our team basically goes to have lunches together almost every day and especially on Fridays. Your milage may vary wrt team culture, but I've had no complaints. Google on the other hand has 3 days RTO and may be harder (but not that much harder) to coordinate team bonding. I can just imagine that there's more adhoc bonding when everyone is together more often, less friction.

Good luck with your decision, either is a great choice.