I'd love to know more about how to check this.
As an example the Stumpjumper FSR frame is available in "standard" 9m FACT carbon for $3k (with a CTD Kashima shock).
The S-Works version is the fancier 11m FACT carbon and it costs $4.5k (with a Fox/Brain Kashima shock).Does anyone know what the difference is or how you might test for it?
I guess ultimately a frame is made of whatever the sticker says it is.
If you ride them back to back you can tell. The 11m will be lighter and snappier than the 9m. You can also tell by cross sectioning the tubes and getting the carbon layup inspected! :lol: