So what is the best choice of this group? The answer to that is likely the one you can afford. The greatest value is the standard Carrera, no question. They tested a 7-speed manual version and it is a good value at $97k in this company and also the lightest of the group at 3229 pounds. Yes, even lighter than the GT3 RS.
3229 - 2017 991.2 Carrera manual
3292 - 2016 GT3 RS
3510 - 2017 Carrera 4S
3514 - 2017 Carrera S Cabriolet
3563 - 2017 911 Turbo S
If you opt for all wheel drive in a 911 the penalty is close to 300 pounds. The heaviest combo would be an all wheel drive convertible but they did not test this. The Turbo S is the heaviest car out of the group and a Turbo S convertible would likely be the heaviest 911 for sale.
Still, you can have your 911 is basically any flavor. If you want a lightweight and rear wheel drive 911 the Carrera fits the bill. It's pretty quick too. Note that the PDK Would be much quicker and faster than the manual:
1/4 mile times:
12.4 @ 114.9 is not bad at all. Especially considering the PDK version will run 11.9 @ 118. The Carrera 4S is offering 997.1 generation 911 Turbo performance which is incredible. With a couple upgrades it will be right on the tail of the drag race champ which of course is the 911 Turbo S.
With the 991.2 Porsche gave the Turbo S different, bigger turbochargers and you see the dividends in the performance numbers. The GT3 RS is surprisingly not far off the trap speed despite less power, torque, and the rear wheel drive layout.
The GT3 RS is obviously the top choice for someone who wants the closest thing to a 911 race car for the street. It is also incredibly expensive and will be replaced soon with the 991.2 generation car.
So which is truly the best of this group? For the dollar, it's impossible to beat the Carrera. Is the Turbo S really $100k better than the Carrera or Carrera S? No way. Road and Track picks the Turbo S as the choice of the group but when you're spending imaginary money why not just say the 918 Spyder is the car to get in the Porsche lineup?
All of these are fantastic cars. There is no loser. The choice is simply what is best for you and your bank account.