It's definitely better. Amazon's business model is inherently more sustainable than traditional brick mortar, they essentially remove a step in the value stream

It's definitely better. Amazon's business model is inherently more sustainable than traditional brick mortar, they essentially remove a step in the value stream. For a brick a mortar store (and this is a little oversimplified), it goes manufacturer>warehouse/distribution center>store>customer drives to store. Note too, that the last step is usually store(s) plural unless you're doing all your shopping at a place like Walmart. For Amazon, they cut out that entire last step and replace it with a model where a multitude of people can have their needs fulfilled with efficient routes.