Why is the base Porsche Panamera way more expensive than an AMG C63?

I am currently choosing between a Base Panamera or an AMG C63. I don't
know much about cars but from a simple research, the AMG C63 cost
$68,100, 0~60 in 3.9s. 469 HP, 479 lb/ft torque, 4.0L V8 biturbo . The
Panamera cost $87,200, 0~60 in 5.4s. 330 HP, 330 lb/ft torque, 3.0 L
turbocharged V6. Why does the Panamera cost $19,100 more than the AMG
C63 when the AMG C63 seems to perform way better, much more
horsepower and a V8 instead of the V6 in the Porsche.