I think there is something wrong with your coffee. Besides the single vs 2 stage, I also stated that 60-80 gallon difference is hardly a difference and that I was talking more theoretical than specific to this thread.
There is an issue with the emerson motor on the IR unit. My research has shown that these motors will last when wired properly and given enough juice. They are very sensitive to resistance, and specifically if too small wiring is used they will burn out. I was recommended to go with a 10 gauge wire, which is drastically too small for the load. If most go with the recommendation, there is the issue. I ended up using 6 gauge IIRC, which is the wire actually rated for the amp draw.