i have ongoing projects i have been working on for 20 years or so.
i know people have photographed the same things, and to me it doesn't really matter, because i am not them, they are not me, and we don't see the world through the same lens .. but as the years go by, the project shifts a little bit, and while it is the same project, it is different in a certain way.
strange thing - as i write this i am reminded of an assignment for a newspaper i was given. i went to a big fabric plant and photograph how they were doing things for the war-effort. i went there and shot a bunch of frames and the one that was published was of a guy looking at camouflage fabric after it was printed and coming down into the bin. the next day there was a story in the large daily paper on the same subject. it was shot by a different photographer, at a different plant &C, but it was the same image ( with a different person inspecting the fabric ) -- i guess sometimes different people see the same thing
i do have some techniques that i use that i won't tell in full what they are, sometimes it is the technique, that gets you to the final image, not just the exposing the film.