If you want the best optics, you want glass. If you want the best scratch resistance, you want glass. If you want the best glass optics and polarizing technology, you want Maui Jims. I have never seen such a big difference between ANY other sunglasses. They are pricey but very high quality and they are extremely comfortable. This is from their web site;
"PolarizedPlus®2: In every pair of Maui Jims you’ll find our patented, color-infused lens technology that wipes out 99.9% of glare, 100% of harmful UV and boosts color via specially designed lens treatments. So your view is clearer, with crisper contrast and amazing brilliance."
"ST (SuperThin) Glass: When clarity is the priority, go with the best optics available. Durable. Scratch resistant. 20% thinner and lighter than standard laminated glass lenses for long-wearing comfort, whether you’re driving or relying on them every day. Three rare earth elements ensure brilliance everywhere you look."