Head loss is proportional to the flow rate squared. So a larger pump results in higher flow rates and thus higher head loss which means the difference in HP shows up as a difference in filter pressure. My nominal pressure at full speed in 11 PSI. I will sometimes get a 1 PSI rise after 1 year which is about a 10% rise. We normally (TFP) recommend a 25% maximum rise before cleaning. A larger pump would simply just inflate both the clean and dirty filter pressures by approximately the same factor (e.g. 2x). So if you measure pressure rise as a percent of clean filter pressure, it shouldn't matter what size pump you have. Cleaning would occur at approximately the same time.
However, if you wait for a 8-10 PSI rise as many manufactures recommend, you may never get that PSI rise on a smaller pump while with a larger pump (head curve doesn't allow for it), you would reach that point much sooner. This is the reason we have chosen to abandon this method because it ignores the size of the pump (and also RPM). using a percentage PSI rise instead is much more logical and it accounts for the differences in flow rates and pump size so the filter is cleaned at the same point in time regardless of the pump size.