IIRC, the DxOMark website says (somewhere) that their sensor scores can only be used to compare sensors of the same resolution (MP). So, first decide the resolution of sensor you are interested in (need), then compare sensors of that resolution.
It's a great point, and thanks for mentioning it!
@dtaylor, it's at the bottom of this linked page, which is easily accesed from the About tab. Of course, that page also states, "Sensor Overall Score AND resolution are two independent metrics of sensor performance." Since the Sensor Overall Score is based on image data normalized to a fixed resolution (8 MP), and since the greater the resolution of the sensor relative to that fixed value, the greater the differential impact of that normalization, that would seem to make the Sensor Overall Score a dependent measure, not an independent measure. But it's been a while since I took basic statistics, so maybe they've changed the definition of an independent measure since then...
@tnargs, if anything, that just makes the main point of post #1 even stronger. If DxO truly means that you can only use their scores to compare sensors of similar resolution, that make their results even more meaningless in the real world. Furthermore, that begs the question - why normalize at all, if you can only compare sensors of simlar resolutions, normalization is moot.
BTW, putting it in big bold type on every page wouldn't help. They put big, black Speed Limit signs on all the roads, ho many people actually drive the speed limit or below?