Even if you had the "engineering type" paper with lots of technical data on stiffness and compliance, you might still be into "data overload". Those white papers need to be applied towards the 4 different riding disciplines that you first mentioned.
Even if applied, it needs to be applied towards the specific manufacturing prodiucts out there in the marketplace. Is the top of the line time trial bike about the same for all manufacturers?
That's the "objective" thing that will be difficult. I don't think you will find it.