This conversation is like I say, "My car has better mileage because it will go a greater distance on a gallon of gas," and you saying, "My car has better mileage because it will go for more time on a gallon of gas." We are talking about the same thing, just approaching the question from different angles. I admit that my angle is not the one used by the OP in his question, but it has the advantage of an internet full of sites with lovely charts comparing and ranking cameras according to DR at different ISOs. I also admit that a little diligent google-work could probably find oodles of charts ranking cameras by noise levels - expressed in ADUs or by S/N or some other esoteric units - and ya' know what, no matter how the charts or lists are framed, the order of the cameras will always be pretty much the same.
At any rate, the OP has probably said by now, "To hell with it," and bought a Sony.