That's an interesting question, imo. Google is (was?) also very well known for (A) making decisions with data and (B) letting flowers bloom, fail, and moving on.
You could describe both with the same shorthand cliches, but they're obviously very different.
I think the difference is how intentional they are. In this case, they want to do physical retail. They have certain ideas about what meaningful wins they can achieve in retail. What they're "testing" are, in a very broad sense, implimentation details and approaches. They are intent ona destination, but very expiremental about the route.
Google is/was either more "blue sky." They "expirement" more like a VC or incubator expirements. It's more about making likely betys than finding a way to do X. Anything that seems promising is worth a go. They have certain areas (ML, web/mobile platorms) that they invest particularly heavily in, similar to a VC's specific health-tech or ed-tech funds, but the destination is blue sky... "change the world and make billions with ML."
I would say amazon does it more like a startup, and Google is more like a startup investor.
BTW, sometimes one works and sometimes the other works. Google (mostly via android) had far more success in mobile devices/OSs, even though both attempted it.
I think you have to give the edge to amazon though. They managed to build a new business that was better than the old one. Google still makes all its money fom search+ads and supporting stuff. Even their big product successes (android, chrome, drive/docs, maps, etc.) are not money spinners. They arguably support the search+ads business, but nothing is in the same league as aws.