In my view, given the conditions, you were hydroplaning. Whether a car hydroplanes is not something the car has control over, but a factor of the road conditions and the tires' abilities. I wouldn't necessarily attribute anything to the 3GT vs your last car. (But perhaps compare the tires' performance and road condition)
I'm very sorry to hear that the car is totaled, but I'm also glad you were able to walk away from a terrible accident with only minor injuries! That 3GT seemed to have kept you alive and in good shape
