no, i know what an rs tuner does. so what your saying is that the rs tuner is more useful as it can be used to read faults etc, as opposed to saying the actual mapping on an rs tuner is better?
Im saying the first categorically, and im saying that in my opinion the second is true as well.
But I dont have back to back rolling road graphs from the same car to "prove" it and even if I did it wouldnt automatically prove that on another car the same generic map out of the 2 would win as these cars vary a lot and what map suits one wont automatically also suit the other as the standard airflow between the 2 engines can be so difference and hence so are the requirements for fuelling and with it being a speed density based fueling algorithm not a mass air flow based one, the ecu/map will have no way of adapting to suit the specific engine, so there can never really be a clear winner that is always guarenteed best even if you tested 10 and they all worked best on one the 11th might not.
But having driven a couple of cars with the superchip and a lot with the RS Tuner, I personally would say the RS Tuner certainly seems by far the better option based on my experience and I think the number of 172s the superchip would better suit is somewhere between none and very few!