erh.
So the shutter/aperture will be different, or the same? You said "no", then said something which (appears) to be largely irrelevant.
Do you mean no, or perhaps yes? (I may be misunderstanding your last two sentences)
They are not different because the metering system is tuned for the imaging pipeline. The number of photons captured per pixel given the same EV will not be the same, but the output (apparent) signal strenghth will be the same after amplification and ADC.