I have Costa Del Mars and Maui Jims. My Costas are for bright sun and big water (blue mirror, grey lens, glass). Maui's are amber with polycarbonate lenses and super light frames.
You will use lighter, amber lenses more on trout water. There's usually some cover, and you'll be fishing early and late. Grey, dark lenses aren't great in these situations. Amber is also better for spotting fish. HOWEVER, color blocking/enhancing lenses are best for fish spotting, whatever the tint (Smith Optics excels here, although Costa 580s block color noise and enhance contrast, and Maui's also enhance contrast and boost color).
Glass is better than poly w/respect to clarity and uniformity. However, I wear poly when trout fishing. It's lighter for all day wear, which is hugely important when hiking into the woods. They also won't break when you hit them with a clouser.
IE http://www.mauijim.com/shop/en/us/lighthouse
in HCL bronze for all light conditions, Maui HT for low light/overcast/heavy cover (ie. bookie fishing shades). Super light, you will forget they're on, and great for driving.