400 hp 5.2l vs 5.9l Magnums

Sure there are trade offs that be made, but the 5.9 crate engine made 440 ft lbs at 4100 rpm with stock 9 to 1 compression, while the 5.2 magnum build with KB pistons at 10 to 1 and quench made 382 ft lbs at 4900.

Apples to apples that is a huge difference.
The create also has a slightly bigger cam, 1 point of cr is about 3-4% power increase so 12-16 hp. Torque to the ground is more important than at the crank, a 318 is gonna need about a 13% deeper gear than a 360 there's only a 15% difference between those torque peaks.