China and Indian glass is all cheaper. This is because yes, the cost of labor is about 1/10 to 1/20 that of an American worker. This makes the material they start out with cheaper as well as the labor it takes to turn the raw glass into products.
Elev8 understands budgets and offers both American-made glass, a lot by Elev8 Premier, foreign glass and even our Elev8 hybrid glass.