No. If you change more than one parameter, you invalidate the test. You want to compare naked resolution of the sensors on various camera makes and models, then you need to start with a lens that will resolve more than the sensor will, and that same lens must be used on every camera. Otherwise, you are testing lenses as much as sensors.
Hmm, its possible to mount a screw mount on most (all?) major brand DSLRs, isn't it?
Love, Light and Peace, - Peter Loveday Director of Development, eyeon Software