Because sometimes there is a weight break at a low CID that you can take advantage of.
This is an unanswerable question due to the near endless amount of combinations. If you tested this idea at the same cubic inch then you would also have to try the various strokes. Then there is every part of the engine that has to match and then every part of the engine that can be replaced with another part to try.
So, having a many different cranks, rods, journal sizes, pin sizes, piston variations, camshafts, bearings, don’t forget the roller cam bearings, piston ring packs…….. every part changeable on the engine would need to be compared.
Win lotto and find out.
Why even answer him?