On 8-May-2006, Bill Tuthill wrote:

Spectra and Dyneema are both made of polyethylene, but is that evidence
to indicate they are really "the same thing"?

At the fiber level, yes, since one is simply licensed from the other. At the finished
product level - they may be different, since the manufacturer of the rope will put
in his spec which may be different - different core, different sheath etc. These
things will affect the stretch (static vs dynamic), hand etc.

Sort of like comparing two GoreTex jackets - the GoreTex is the same, but the
jackets can be very different - even the fabric onto which the GoreTex is bonded
can be different.

Mike