Quantum and V-Stream are one in the same. The difference is in the thickness. Spend the $50 extra and get the " Special Edition " 6mm thick. You'll appreciate the sturdiness when it's up to its max height and doing 85 mph.
I put an F4 on. Got the taller/wider one and it works fantastic for me. Very clear and the rain runs off. Easy to clean bugs off. Was a bit perplexed when the shield arrived, you would think that when you pay that much they would finish the edge. Used some fine sandpaper and cleaned it up easy.