A Comparison of exactly what? How insulating the floor of a car in a Convertible will reduce wind noise?
A comparison if insulating the floor of a convertible has any noticeable decrease in cabin noise. It's proven to be effective on a hard top. But if wind noise is THE major/overwhelming source of noise in a convertible, a completely covered floor might not do much. You might decrease the noise coming up from the road, but you can't hear that anyway because the wind noise is the major source
