There really is no way to compare IR as the equipment used and the ambient and pack temp will have an impact on the IR. Also a wired pack versus a inboard pack will have different IR. This is why we don't list IR. Currently our 7200s have been in the 2.0 to 2.4 range on inboard packs. The 5600s have been in the 3.8 to 4.20 range. These are tested using our ESR meter at storage charge and 72 degrees.