I'm trying to compare
These Tarps

vs

using the 70d Urethane Coated Ripstop Nylon, from DIYGearSupply to make my own.

I have an older version of the Sportsmansguide tarp, in the old white color, but I'm not sure what it was made out of, and after 6 years, it needs replacing.

How do the 2 Nylons compare in strength? or Water proofness?

Sil is out for me ATM, I'm at the slow point of the year for work, so I simply cannot afford $6+/yd