I still think there's no right answer to this question. It's all personal preference and circumstantial.
My V6 was $10,000. That's certified used with 50K on it. The average certified used V6 goes for between $15,000 and $20,000 around me. GT's are $20,000 or higher. The choice for me was simple.
$10,000 for the car. $7,5000 for the Procharger (installed and dynoed). Less cost than a GT, better gas mileage, and lower insurance. 29, single, and 13 years of clean driving history and my insurance is insane simply because of where I live.
450whp to me, is the max I want in a daily driver. If I were truly planning on more track time (autocross or drag), then I would've gone GT. Having the higher ceiling would've been nice and needed. However that's not the route for me.
I'm also not dumb enough to compare my car versus a Coyote powered Mustang. 09-previous V8, sure. Any other manufacturer's RWD V6, sure. Outside of that, I stay in my lane. I'm a diehard Nissan lover, but comparing my Mustang to a 350/370Z? I'll get Mustang all day.