I'm definitely not a expert but what I have learned is if you're adding Automation then you should keep brands the same so they can play well with each other, so that may help your decision. I'm also thinking those two pumps listed are not on the same level being the Intelliflo is more like the Cadillac(upgrade) and the Max-Flo the Buick(entry level) but again I'm not a expert in this field. The Ecostar would be more comparable to the Intelliflo, someone more knowledgeable will be along I'm sure to help.
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