I love your back and forth on this one. My company distributes windows and doors, but we do stay away from inferior products.The bottom line is how a customer can get the best value for the money.(System,location,effects,weather patterns etc.etc.)I could give you an earful on both companies,but that would take too long.Lets sum it up.Every Company has a Target Market.Every Company offers a Warranty. - Wait,Some of the best companies actually don't. Why,their products reputation speaks for itself. Warranties, you can throw those out the window,literally.
From a guy thats been in construction since over 35 years
The Milgard warranty exclusion for coverage related to a location being within two miles of salt water may apply only to "hardware" and not glass and frames. Did you validate this with Milgard, that is, confirm their definition of "hardware" to see if it applied or did not apply to the part of your window(s) that failed?