If I had to guess an equivalent RCT with N95s would find them to be ~2x as effective as surgical masks.
(My best guess: The difference is much more dramatic than that because non-sealing masks allow unfiltered air to leak from the edges; so the amount of aerosols that gets inhaled while wearing a regular mask can easily be 2 orders of magnitude larger than when wearing an N95/FFP2/FFP3 respirator.)
(My best guess: The difference is much more dramatic than that because non-sealing masks allow unfiltered air to leak from the edges; so the amount of aerosols that gets inhaled while wearing a regular mask can easily be 2 orders of magnitude larger than when wearing an N95/FFP2/FFP3 respirator.)