Kind of a funny comparison.....
THIS car has a 360:
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THIS one has a 383:
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The Dart has stock 8.2 compression, exhaust manifolds, 2 1/4" exhaust, an MP 280/474 cam, Weiand intake and a Holley 600. 4.10 SG.
The Charger has 9.2 compression, headers, 2 1/4" exhaust, an MP 280/474 cam, Edelbrock Performer RPM intake and a Holley 750. 3.91 SG.
The Dart has more low end torque than the Charger. It feels quicker out of the hole but the Charger will catch up and make up for it when the rpms climb. I attribute the difference to the difference in weight and the stroke. The lighter Dart has more stroke so it gets moving faster initially. A higher stall converter and swap the gears car to car and the Charger would pull from a dig much better.