just wondering if anyone bought option and if the braking is any different

 

Not to be a smart a** but i would imagine any car upgrading to Brembo brakes would be different (ie, improvement) over lesser brakes.

 

Well better to buy the Grand Touring, they come with Brembo and yes you have a diffñÓence in breaking. Brembo are stronger and break better, but if you change pad and rotor with the regular one, you can have enough breaking for most people here.

 

how much more did it cost?

 

For what? Grand Touring roadster vs normal roadster? Like around 3500$ Can. But if you talk to change pad and rotor, around 600$ Can. You can go with Brembo cross drill or slotted and high performance pad. You have a lot of choice for aftermarket rotor and pads.

 

There doesn't seem to be much difference on the Grand touring roadster than the touring roadster. My opinion is, Nissan should have did a 35th ZR w/ 300 hp and the rims.

 

Yep, but the ZR seems to be always the last updated.

Hope they will make a G35 or 350Z with the awd system like the G35x.