Probably won't be much different to the grooved ones they have now tbh. AFAIK just about every other racing series use full slicks, god knows why they were banned in F1 which is supposed to be the pinnacle of motorsport.
They were trying to reduce cornering speeds, to supposedly make the racing safer and more competitive, they forgot though, that huge great wide slick tyres cause great anmounts of turbulence behind the car, which is great for slipstreaming and overtaking.
