The new GT definitely has the advantage in the looks department. We'll have to see about the power.
Ed
I suspect the McLaren 675LT is the closest thing to the GT. Horsepower, weight, transmission gears, drivetrain (RWD versus AWD) and even price make them very similar, at least on paper.
And as someone who has driven the 675LT it doesn't bother me at all to think the two might have similar performance. That car flies, and I suspect the GT will be at least a bit quicker.