Personally I would take the "comfort" version. As far as I understand you will not use the car on track. So You don't need cage and so on.
Two year ago I looked for a used 997 GT3. I always looked for cars without bucket seats and cage, because I don't want to buy a car which is used mainly on track.
I think there is enough demand to sell both versions of the GT3 in 3 years.

So buy what YOU prefere.

If you decide for the P07 version, ask me in 3 years for buy the car Smiley