For D.
Nope,don't need any equipment. Except to measure breaking, cones? wet and dry perhaps, but just what weather is on the day will do. Hopefully it will be consistent.
I'll wager, if we group drivers honestly, say 3 groups for arguments sake. Each group will come to the same conclusion, given the chance to drive the same car on each set.
We'll need 3 models of omega in sound mechanical order re suspension and steering and set up.
Mv6
Cdx or CD or Gls etc
Elite
Measure;
ride feel(comfort)
No of corrections at the steering wheel(tramlining)
Braking. (Difficult to get both wet and dry tbh. Wet might mean more)
Lateral load (speed on a constant curve, eg roundabout)
Noise (we have ears)
Easy!
Although I'd accept completely the points on personal preference. As said earlier, if nothing else drivers can pick something out for themselves.
I suppose its possible, if you account for everything. But being a clinical researcher myself, I am aware of the poor concordance when one tries to align subjective feelings. The mechanical aspects are probably easier to account for.
I am obviously comparing symptoms people experience in illness or health, like pain, breathlessness, depression, quality of life etc. Its very hard to find a linear correlation.
Certainly worth trying out though.