In terms of Refinement how does SRT-10 compare to other Performance Cars?

[VEETENN]

I know the SRT-10 is more refined than a Gen 2 Viper but how does it compare to Porsche or BMW M cars or Mercedes AMG or even Corvette? I realize these brands are much more expensive but for those who have experienced many of these models (new) how would you rate them all?

On a scale of 1-10 rate each of the performance brands with 1 being the lowest refinement and 10 the highest.