Can anyone explain why the tyre pressures are lower on the GT2 than the Turbo?

My guess would be that the sidewalls on the GT2 rear tyres are stiffer than on the Turbo tyres.

Any guess yet what the pressures will be on the new GT3 with Rosso tyres? I'm very curious to see how they compare to the turbo pressures. If they are a lot lower I will be very curious to know why. The tyre size is identical.

S.