Simonton Prism Bronze vs. Reliabilt Survivor 5600

Lowe's is running a special on the Reliabilt Survivor 5600 series - free Low-E and Argon.
A contact at a local Norandex/Reynolds dealer suggested the Simonton Prism Bronze series.
With all other features being equal (grids, screens, etc) and the prices within a few dollars of each other, which window would be the better choice?
They're going in a basic colonial in western NY where the owners plan to live for 5 - 6 more years. The install will be a DIY project.
Thanks!
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The one with the more durable moving parts, sliders (if double hung), hinges & cranks (if casement). In a few years you wont care a bit about energy, but only if they lasted mechanically.
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Thanks, Mr Obvious. Kidding! :-)
Specs such as U-factors and R-values are somewhat easy to find (I have most of them, and they are comparable) but things like "the more durable moving parts" aren't listed on any spec sheet. I was hoping someone familiar with both brands could speak to that sort of stuff.
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