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There really isn’t any particular advantage to using the “Live” GTM snippet. When you access this, you would get the environment parameters filled in just like for any other environment.
Meanwhile, if you select “Install GTM”, the environment-specific parameters are omitted. This is because when these parameters aren’t specified, GTM will default to the live environment.
Identifying the live environment via the snippet doesn’t provide any unique benefits, mainly because it’s not possible to alter which environment is seen as live. As per my knowledge, env-2 is always deemed live. It’s interesting because you might think that env-1 would be preserved for the primary live environment, but this isn’t the case.
