Presumably these tests were performed with well-fitted masks, or else it would seem inconsistent to claim both that N95 gives a dramatic improvement and that leakage dominates. Personally, I have yet to find a disposable mask, whether N95 or not, and with a nosepiece, that fits well enough that my glasses don't fog up when I go indoors (they do, however, meet the inflation test.) This leaves me unsure how much better N95s are in my case, though I will continue to use them.

When I worked shifts in a vaccination center, I used medical tape along the top edge of the masks I wore.