I'd agree with BeerGuy that there is no right or wrong answer here. The fact that you have made a decision based on what you saw & felt when you test drove the GT means you made the correct choice...for you.
I previously owned a 2012 Granturismo 4.7 (not the MC) from new & it gave me nothing but pleasure & a trouble free 4 years. When change over time came however & I drove the Ghibli as an alternative choice (I am advancing in years) the creature comforts & the extra doors certainly played a part in that decision. Again I concur with BeerGuy, the sound of a Maserati V8 is something the Ghibli V6 doesn't quite replicate....good enough for me though. Maybe my next will be a Ghibli Trofeo & get the best of both worlds...will have to start saving my pennies.