Last week, Tom responded to your questions on the forums, explaining the differences between 1050 denier Ballistic Nylon and 1000 denier Cordura:
“There are two significant tehnical differences between cordura and ballistic nylon. First, ballistic is a “filament” yard, vs cordura which is texturized. This means ballistic nylon yarns are smooth & slick; cordura yarns are slightly fuzzy, actually discontinuous, more like a natural fiber. This gives cordura somewhat higher abrasion resistance, while the ballistic has higher tear strength. However, in both fabrics the tear strength and the abrasion resistance are so much higher than neccessary, the end-user will seldom if ever experience any difference between cordura and ballistic.”
Read Tom’s entire forum post about fabrics.