Handeman, I was only using the 1" as a reference for the similar tensile strengths of tubular nylon vs nylon webbing. I found those numbers quickly in my online search. Reading my original post, it does seem like I was deciding between the 1" versions of each for my 4" blue tube project. Sorry for the poor wording. I will be using a smaller size strap (probably 9/16", since that seems relatively easy to find).
Just thought of another question regarding the two nylon strap choices. I am planning to sew my own loops per the tutorial on John Cocker's website (using a sewing awl, the Speedy Stitch, using crossing lock stitches). Coker demonstrates the technique on nylon strap, not tubular nylon. Can the tubular nylon be stitched the same way?