As shown by the two attached "screen-shots"., the ERF-9530 states a gate-threshold of 2v-4v (using an improper nomenclature of "V/TH"), whereas the 24N40 states a gate-threshold of 3v-5v (using the proper nomenclature of "V/GS(th)"
What get's me "blown-away" / amazed., is how someone / anyone...