It is instructive to see in older reloading manuals the differences in maximum charge weights between HP38/W231 and H110/W296.
What that shows you is the lot to lot difference of identical powders.
In the older manuals, they were working with powder out of the same factory but through two separate distribution chains. So a tester could get lot to lot variations, maybe even in opposite directions for the two brand names.
Now, it is all handled out of the same warehouse, there is only one set of lot variation even though packed under two labels. Look at the Hodgdon www or book. The load data is identical, down to the last tenth of a grain and CUP. That tells me they only ran one set of tests and just wrote it down twice.
Same stuff. Hodgdon says so.