The strange thing is that I get least irritation from R41 2013. When shaving daily, this is the razor I am using.
I use a 2013 R41 w/ a huge variety of blades daily. I range anywhere from 2 pass DFS to a 4 pass BBS depending on my mood. I won't say there is zero irritation after the 4 pass, but a 2 pass DFS is completely irritation free.