This is consistent with my own previous calculation regarding the silver used in polyester sportswear. By weight, such products only use 1/40,000th of silver, relative to the weight of all other inputs. This means (as I have often observed before) that such silver-based products will be extremely price-inelastic. What that equates to is that the demand for such products will change very little -- even with very large increases in the price of silver. Given this parameter, price does not appear to be the most important determinant in a longer term analysis of which is the superior technology.
In summary, the combination of flexibility and efficacy seems to provide a significant advantage to silver-based technology in the battle against microorganisms -- and especially bacteria -- while its price inelasticity means that demand will stay strong, even in the face of large increases in the price of silver.
With super-bugs and new issues such as medical tourism, the importance of such technology can only grow with time. This puts silver in the unique position of being a good which may not only save you financially, but also may save your life.