Porsche

GT = Grand Touring
GTS = Porsche Badge that is not limited to the 911 Carrera. The 911 GTS is by no means a tarted up 911. It has a top speed of 193 MPH.
It also lops off 6/10 of a second (3.2 vs 3.8) in the standard 0-60 MPH benchmark as compared to a standard 911 (both with the Sport Chrono PKG). That difference is well beyond substantial. As far as tarting a car up goes: 94 more HP and 91 more foot pounds of torque is in the neighborhood of a 25% increase when combining the two increases into a single stat.

All that said: let’s not lose sight of the fact that a GT3 barely out performs the GTS, and does so only in place. For instance: the 2 cars share the exact same 0-60 MPH times with the GT3 gaining only 6 MPH in top track speed (199 vs 193 MPH). It must be that whopping 23 more HP the GT3 has over the GTS?
All changes aside, and as extensive as they may be, calling the GT3 a tarted up GTS rings much truer than calling a GTS a tarted up 911, when considering performance alone. The fact remains, Porsche builds the GT3 to go racing, and it’s a bonafide race car with its built-in roll cage and other mandated race features that qualify it to be raced in the GT3 class by Porsche and other race teams. You can now get them with Touring packages for those that don’t plan on running them at the track (it does away with the giant swan tail- as they currently call it).

sorry but so much of this is incorrect... factually and in use... the poster seems to have an interest in these cars but is inexperienced and just mistaken about the history leading to the present of the 911 and its variants

Sorry my bad, X51. Other than that everything else is spot on. Point being it is just another option, a power kit, that can be ordered on any Carrera S. In sharp contrast to the GT3 which uses a completely different engine.

I do not for one second expect those who don't know Porsche to get one word of this. Can't get DBA, MTM, etc how ya gonna get GTS, GT3? You are not. You will always think it is hp and other numbers equally as irrelevant as wpc. As it has been so shall it ever be.

https://www.youtube.com/watch?v=sOE9mNe5c7M

I know Porsche pretty well.  I have been to the factory four times.

For nearly 20 years the GT cars have been built on the same line as other 911s.  Yes there are some different bits but it certainly isn't correct to say the GT3 engine is 'completely different'.  Miller is just making out he has something really special.  More accurate to say it is very nearly the same.

For those who unlike Miller are not satisfied by the GT3 experience, I run a 997 GT2 I have had from new in 2008.  At that time the most powerful road Porsche ever built, it's 530 turbo powered horses to the rear wheels.  Still seriously quick by any standards it does 7.6s to 100mph and 206 for those brave enough.  Even today there is no road Porsche with bigger rear tyres.   It is a wonderful drive at Goodwood where I take it twice a year.

Also, up until the 992, GTS also came with the wide body, whereas the Carrera S did not. So it was more than merely a souped up Carrera S. 

Wow… I finally know more about something than Millercarbon.  A GT car is NOT a sports car or track car.  GT cars are meant for long haul cruising with occasional blasts of Alpine fun.  Think Bentley GT. A Porsche 911 Carrera is a sports car.  GT3 is more a track car for the road.    But when it comes to audio, Millercarbon has me beat everyday.

Harman Kardon makes 90% of the in car audio systems wiring looms etc world wide, regardless how they are branded. That is why Samsung bought them.