Well I am not as experienced with sweet water fishing as I am with salt water, coastal salt water mainly. But colours do matter, and laminates do matter. The horizontal lam when using transparent colours, gives you a 3rd colour as it falls from the surface to the bottom, and alot of strikes are in the fall zone, so the fish see these colours as the mixed colour often. But on the opeque' colours, I think the darker top colour darkens/shadows the bottom colour. I have seen where 2 or 3 brand lures, same colour, only one caught fish, same type lure, just one I never ever caught a fish on, was the Bass assassin eel, flat bodied, lam is flat. It was more or less like the lure GB was talkin about, and I tried hookin the lure horizontal and vertical.
All in all, I guess with a vertical laminate in an opeque' colour would depend on which side the fish was on, would dictate whether it would bite or not.