Of course there are practical ...

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Of course there are practical considerations based on the actual installation, but we have a neat tool (Novedar_EDSS) that can quickly compare the two alternatives based on your specific requirements... http://www.lequia.udg.edu/dissemination/news/item/2634-novedar.html . As Randal mentioned there are other possibilities, which the tool can also consider and rank based on your priorities.  Feel free to contact me if you think you might want to apply this tool.