Originally Posted by
m.c.
Ive had sensory issues my entire life. Some things are very unpleasant for me. I know things I say or do are odd to most people. I was just passing along something I found with certain materials, for me. If you don't notice these things that is good, life is easier for you.
This shows there is some difference in frame materials and vibration/shock but I don't think its a detailed report.
https://web.mit.edu/2.tha/www/ppt/Bike-ISEA.pdf
There are indeed differences in frame materials. I think it takes decades of practice to learn which generalizations are accurate, if any. All of us are trying to reason from a few specifics to some general characterizations. I'd be surprised if any of actually have that ability, objectively.