Go and do it if you haven’t done it already ! You got told several times there might be no noticeable benefits yet your still beating on a dead horse ! Flash the Ecu with new firmware and please update the thread with results In case your bricking your Ecu so people don’t try this at home anymore ! You need info either do it yourself or ask on digital kaos or Ecuconections forums…It iseems we need to hear from someone who has actually done this FM to KC update.
It is irrelevant whether releavant to emission or tuning.
Car engine is free from any fault, and probably I would not do a tuning, but uptading to KC.