from someone who has the lens not a bunch of speculators......
the polarization makes it so the lens can reduce the amount of glare which makes the sun brighter than it actually is. because it reduces glare and not blocks tons of sun, like a dark iridium it makes it much more versitile than those lenses. also it has an irdium coating, which blocks strong sun with mirror effect.
i have a hi yellow lens as well and a grey polarized and i have used most other oakley lenses. i can tell you that this is the most versitile lens that anyone makes. i never use my hi yellow, even in blizzards because i think that is one of the most poor lenses they make, as soon as the sun comes out you are fucked. i find too that even my grey polarized makes me squint more than the hi amber polarized when the sun is super bright, because grey irdium has no iridium coating.
BOTTOM LINE BEST LENS EVER AND WORTH ALL OF THE MONEY, JUST KEEP IT IN GOOD SHAPE AND IT COULD LAST FOREVER!