tangent, but germane to this conversation ...
is my armchair hypothesis that there are two classes of RA stiffness, viz.,
stiffness that comes from the mold (cross section shape, beam width., etc.)
vs
stiffness that comes from the layup & composition (graphite type, layering, etc.)
If I'm right (which occasionally happens
) then if two different model frames differ in either of those aspects, you can't necessarily conclude that "it'd be perfect if it had a +1 mm beam" or "a lighter layup would make it just like <some beloved vintage frame> / like the other frame in the lineup, but better", etc.
The Gravity Pro vs Tour or the Yonex Vcore Pro 100 (2021 vs prior model) are examples of what I'm talking about.
just another ponderable to put out there for the TTW hive mind
/Acey