If you're talking about looks alone then the color and the wheels and lowering stance etc are FAR more important than generation or GTS vs. SRT! Any Viper gets more attention than any Corvette if they are the only 2 cars around, but in a group of Vipers the bright colors, lowered stance, and flashy rims get more attention. We had 26 Vipers at a car show in NY and for the people who don't know one generation from another they were most drawn to a red '03 convertible, custom red/graphite ACR style paint, lowered, red/chrome rims.
Sample: The only thing you can't get a sense of from this picture is how LOW the car looks - it sits almost on the ground and the 'vert helps that image... by my logic a street serpent with a bright paint color would get even more attention. (including more attention than a dark colored GTS)
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