I have raced 2 SLK32s on numerous occasions... both with similar mods to mine, and we have always been within a tenth of each other. So.... an SLK32 would definitely be a good comparison as far as performance. That is if you don't mind being seen in the ugly cousin to the SRT. LOL The SLK32 and the SRT share the same AMG engine, transmission, suspension and braking components. Even many of the interior parts are identical. The SRT is basically an SLK32 with a different Karmann body on it.