As I've been reading and doing research on suspension systems, I've seen references to both Amsteel and Dyneema cordage.

Are these products just brand names of the basic same product kind of like Ford and Chevy? Or, are they fundamentally different in construction and usage?

I see that whoopie slings are made from Amsteel and that some manufacturers of hammocks (Warbonnet for one) uses Dyneema for their suspension. What's the difference? Is one better for a particular usage than the other?

Inquiring minds need to know.