FFP2, N95, and KN95 face masks are all essentially the same, with each filtering out 95% of particles when you use them.
FFP2, N95, and KN95 are the codes used for manufacturing standards in different parts of the world, with FFP2 being used in the EU and UK, N95 being used in America, and KN95 being used in China.
These safety standards are the closest possible equivalents to each other when compared, so all of these masks essentially offer the same benefits.