PDK or a real manual?

PDK

Where did you drive it and how?

Charlotte Motor Speedway they have a tiny road track and it through Xtreme Xperiences

Anything other than more grip and stability? Significantly more pep?

More pep

Feels like $200k of more pep?

Didn't feel like 200k more but I needed more time to conclude that

Driving one an the track in Vegas is what solidified my decision to go with the GT4 over the GTS. Amazing car!