'what is the difference between a spark-py image created using docker-image-tool.sh and the one in docker hub

spark publishes spark-py docker image in docker hub

however in running on kubernetes documentation they say you need to build it with docker image tool

./bin/docker-image-tool.sh -r <repo> -t my-tag -p ./kubernetes/dockerfiles/spark/bindings/python/Dockerfile build

is there a difference between the one created with the docker image tool (assuming using a clean installation) and the docker image in docker hub?

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