Tony,
While it is true that one has to really know a keyboard to get the best from it. I think one can go into a shop and "A-B' keyboards and get a feel fairly quickly as to whether they like it or not. At least I can and I suspect alot of others can as well. Comparing one piano to another as they are both setup supposedly optimum for best sound from the factory is a fair comparison. What I think you are saying though is if one has a board for awhile they can dial in a sound to their liking, which I agree with.
Terry