273 vs 318

was wondering would a stock 273 with a four barrel 500cfm carb. would have the same amount of power as a stock 318 with a two barrel. what are the pros and cons example mileage torque. i have read the 65 charger 273 engines with a four barrel made up to 235 almost the same as a stock 318 two barrel. but that is with bumped up compression and a hotter cam. any thoughts and experiences thanks!