In GT4 i´ve done three seasons of JGTC championships over at GTP, and one of the most difficult aspects of the game was balancing the cars.
Some cars were faster than the others even with less HP. The NSX would always be faster than the rest of the pack if it had the same number of HP.
Since the series was done in the arcade mode, we used the + and - values for weight and power, and tested the cars to get equal laptimes.
I don´t know how can this be adressed here, since the options are pretty much slim. Maybe the Lexus can be matched with the GT-R by letting the drivers use engine tuning stage 3? Maybe the NSX can be matched letting the user put chassis rigidity?
I don´t have money to buy the other two right now, but i have a hard time believing the NSX is that slow. This car was always a beast and it´s neutral handling and tire wear always made a difference.
I raced one season with the Xanavi GT-R ´03 and i got murdered with front tire wear, always a problem with those Skylines... i ended up always using mediums up front and softs in the back.
What i´m saying is, there´s a lot of things to consider when "pairing up" the cars. One other solution is to open the selection to the older JGTC cars, to give players more options and maybe not letting the top ranked drivers in season one get those GTR´s.
I think we all be here for season two, so we should use this season to learn and test things so we can have a great season.
I´ll try to do some testing when i´m able to buy the Lexus and the NSX, but in the meantime i´ll test my older JGTC cars to see how they match up.