But, he said, it is difficult to measure performance differences among products.

A 2009 assessment also included lead among the expected products of the mine.

A free market also means that consumers have a choice among products and services at competitive prices.

The later 4 phases vary among the commercial products available.

Today in the auto industry the choices are among essentially the same products.

"This company can shift quickly among products and has money to invest in advanced technology."

Fire wood is the most important among its products.

Among the products lower in price were fuel oil, natural gas and corn syrup.

However, they are all far slower; who needs more choices among inferior products?

Executives for the three companies do not hesitate to point out the technical differences among their products.