Both the Porsche's & Z-06 with Michelin DOT Race Tires...
GTR & Ferrari & GrandSport Corvette were only cars in top 6 that were on 140+ treadwear 'street' tires.
But the good thing is... I've said this for 10+ years... anyone who actually 'Auto-X's or 'Road Races' knows... that all these tests between cars are heavily weighted more on OEM tire equipment than actual vehicle performance/capability.
You're seeing 'most' top performance sedans/coupes now offering Michelin PS2's from the factory. And now... we're seeing PS2 Cup tires being offered... about the limit in a DOT race tire... Next will be 'who will offer Hoosier A6's'
Peace,
Dave