I think a similar comparison would be a 355 vs a 383. A 496 will make similar HP numbers with similar parts but that power will be at a lower more usable RPM range. The 496 should blow the doors off a 454 in the low end TQ department
E85 racer and E85 carb builder
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68 Camaro, E85 powered 427" small block. 9.96 @ 133 MPH, 1.319 sixty foot on motor. 5.92 eighth @ 116 with a 1.42 sixty breaking beams with back tire on the bottle