Oil flow restrictor size to heads

I measured the holes in two oil restrictor dowels which also register the head and gasket to the block on an E-series.
Original: 3.2mm
New: 3.0mm ( fron either superformance or maranello, don’t recall)
This is about a 15% difference.

Someone said that later Dinos had a smaller sized hole so the camboxes don’t fill with oil but I can’t find anything on the subject.
Is the smaller hole In the new part intentional? (The part # is the same back to the 206...)

thanks Andrew