The LFS may have the same water utility but it could be from a different well or treatment plant.
I would cancel the order, do more research then decide on what you need. Impulse buys always seem to bite me in the butt. I look at a good RO/DI like a fine tool, buy the best and only buy it once as it should last a decade or longer. Look at systems from Spectrapure, Buckeye Hydro, PurelyH2o and others and compare each component, filter micron rating, feature like inline pressure gauges or type of flow restrictor and the DI resin and RO membrane they use.
Again, going back to my previous posts, contact the utility and tell them you are a reef hobbyist and very interested in water quality. They will probably put you in touch with someone that can answer your questions with some authority, they probably have reef hobbyists among their ranks. You need to know your water pressure, TDS and hardness at a minimum before picking a system.