Congratulations. You are overthinking the tire « problem » 

Those Goodyears are not real Goodyears, just like Grant explained. They are the Dunlop Race Max rebranded. 
They are excellent tire. Better in the wet the Michelin. As you will not track this car you will probably not even see any difference. 
Both my RS came with the Dunlops. I was as happy with them as with the Michelin and they actually lasted longer.