choosing sliding patio doors

[mystified]

One vendor says use Andersen Perma Shield another Narroline 200 sliders. House is on the South Fork of LI six miles from the ocean, 1/2 mile from a bay.
Need three sliders, 6'8" H x 8'W. Other windows are in dark bronze but terratone should be OK on outside, possibly inside. Need dark interior. Dark bronze would be best, maybe have to paint the Narrroline to get it.

Vendor one says exterior on PS would hold up much better than Narroline beacuse of salt air, dampness, etc. PS also requires a custom order; whereas Narroline is stock--and about $230 less than PS.

Contractor prefers Andersen.

Thanks for your thoughts about which to choose.