.... it has been 3 weeks since I have take delivery of the new 2012 SII SS Sportwagon M6, since my 3 year lease had ended on the HSV Clubsport 2009 Sportwagon M6.

During that time with the SS, i have clocked up 5000klm, and had the following work performed, OTRCAI, H&M headers + Perrry exhaust fitted, and the tune performed, Harrop brakes fitted + TSW 20" wheels fitted.
But now I have the SS, WOW am I under impressed with the SS, it lacks the pull through the mid range, it is a shocker compared to the HSV.

Both cars had exactly the same mods and the work performed by the same workshop and tuner, the exhaust was swapped between vehicles, naturally except for the brakes and wheels.

I would have expected that the 6.0 vs the 6.2 to be pretty much the same, with the mods etc. however they are 2 totally different animals to drive, in the SS, I am always downshifting earlier and 5th is almost useless.
Even having 135,000 klms on the Clubby, it is a better car.

Has anyone had an experience like this, have I must a fundamental point with the SS, have I forgotten to have something tweaked i.e. the diff ratios etc.

Any feedback or ideas would be gratefully appreciated.

Thanks