To be fair, 500-denier cordura is no match for ballistic nylon, which snake gaiters tend to made from. Its a matter of deflection and stopping a snake from full force impact with your shin, preventing full envenomation. Personally I'm prepared to be bit at some point, but hoping the little feller doesn't give me a good dose. I'll walk out of my hike and get to a hospital. I may be excited, but its best if I can stay calm. I probably won't die regardless. If you're really serious about not being bit (below the knee), get some snake gaiters. As I said, for my environment of mostly running away from me snakes, and very little local history of snake bites on humans without some alcohol involved, I'll go with the cordura gaiters.

Disclaimer: I don't work for any manufacturer or seller of gaiters...