So much for the assumption that all peroxygen based cleaners are equal. It's more likely a, you get what you pay for, situation.
This is an important finding, as it reduces the SUN peroxygen component to a much lower value with a definite impact on meeting the stated specifications. Based on the linked test results, Oxiclean may be a better option, although the report states that the now available "Versatile" product has a different formulation. I took a look at the seventh generation MSDS and it has very wide ranging percentages on its ingredients. Do you have a source for any more accurate values?
So, this sounds substantial. Does this mean that it would be better to have a higher ratio of the SunOxy in the recipe, or that it would be better to just spend the extra bucks on the Oxyclean Free and use it at the current formula ratio? Luckily, the OXY is the only ingredient I haven't purchased yet.