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@M_V
I'm currently reading Ansel Adams' The Negative and he defines/explains EV - or Exposure Value - as referring to "a specific combination of f stop and shutter speed". (and, presumably, is only valid at a certain iso)
He goes on to say that "although EV numbers bear the same relationship to each other that a meter's arithmetic index numbers do, the two are not not interchangeable since EV numbers refer to camera exposure settings, and meter scale numbers refer to* luminance*." (emphasis his)
Sounds like EV takes iso into consideration because it is to do with the camera whereas the meter scale is separate from the camera so is unrelated to iso.