Thats how I read it.
The only 4.7 differences I know of (there may be more) are:
1. Variator modification which a 2012 model will have had done
2. Strad engines have a low friction coating on internal parts
With regards the friction coating, not just the Strad, couple of other interesting insights taken from -
https://www.netcarshow.com/maserati/2012-grancabrio_sport/
"The Maserati GranCabrio Sport uses the latest version of Maserati's sonorous, all-alloy 4.7-litre V8, taken straight from the high-performance GranTurismo MC Stradale.
This naturally aspirated engine produces 450 horsepower (331kW) at 7000rpm: that is10hp more than the GranCabrio. It is also rich with torque, with a peak of 510Nm (20Nm more than the GranCabrio) arriving at 4750rpm. Eighty percent of its maximum torque is already available at just 2500rpm.
The performance increases are a result of Maserati's Friction Reduction Program, which has made the Maserati GranCabrio Sport's engine more reactive to the driver's most-nuanced inputs. This program included a revision of the oil sump's fluid dynamics and the application of a Diamond-Like Coating to the tappets and the super-finished camshaft lobes.
Besides added power, torque and responsiveness, the Friction Reduction Program has lowered the Maserati GranCabrio Sport's fuel consumption by six percent to a combined total of 14.5 litres/100km."