Impacts of "Elite Smart Router" to the Commission-Free Retail level

What are the impacts of “Elite Smart Router” to the Commission Free Retail level? No where in the documentation does it differentiate between the capabilities of one level vs the other. Everything that mentions it is disjointed marketing. I’m talking about impact to the service. For example, when I make an API call as a user at the retail level, what error will I see when I place an LOC or MOC cls order?