Someone asked about different types of carbon. Slightly OT but..
Yes there are different grades of Carbon. Carbon fiber doesn't stretch much but within limits it's possible to adjust it elasticity (Modulus) when it's made. You can also weave cloths with mixtures of Carbon, Kevlar and other materials to make hybrids with very specific properties.
Photo
There are more exotic materials around (eg Boron fiber) but Carbon is reasonably cheap these days.
For more info see a
Guide to composites
Later Edit: I forgot to add that....
In the event of two similar crashes, the use of the same type of Carbon would not constitute a really significant link (any more than the use of the same type of aluminium would).