If the engine combo is slightly “under-cammed”, then the added ratio(area under the curve) should pay off.
Adding ratio is no guarantee of added power.
I’ve swapped rockers from 1.5 to 1.6 several times where the result was a reduction of power across the board.

We have 1.2 break in rockers for SBC.
Sometimes even when swapping from those to the normal 1.5’s or 1.6’s doesn’t result in huge gains.