If you think Kentmere 400 really equals HP5+ or Tri-X, it's mostly demonstrating the extent of visually very significant weaknesses in your imaging chain, such that you are unable to deliver enough information to the film (or subsequently transmit from) to be able to utilise the greater information recording/ transmission capacity of Tri-X or HP5+. Kentmere 400 has many good points, and compared to something like Fomapan 400, it is unbelievably better. K400 has a much narrower usage window than Tri-X or HP5+ etc, but at the qualitative level that many are really actually operating at, it's more than sufficient. Just don't pretend it's superior, that's all.