They don't find significantly more efficiency for N95 masks, but other studies do find N95 masks slightly better. (2)
(1) https://jamanetwork.com/journals/jama/fullarticle/184819
(2) https://onlinelibrary.wiley.com/doi/full/10.1111/j.1750-2659...
Do a search on Google Scholar for "N95" in combination with "virus" or "sars" for more studies.
Really a shame that authorities, including the Surgeon General, claim that masks are not protective, despite medical science to the contrary.