Are diamonds in vintage dealer add-on bezels larger?

[Rob Spayne]

First, hats off to Crown Collection for his consistently great contributions, furthering our collective knowledge on some arcane topics.

In his thread in the reference section about authenticating diamond bezels, he discusses the diamond bezels that Rolex dealers stocked to up-sell customers. Specifically,

"18000 series men’s day- date –
44 brilliants set in yellow gold (part code MBZ4488)
44 brilliants set in platinum (part code MBZ4466).
46 brilliants set in white gold (part code MBZ4690)"

My question is, did these bezels have larger stones than the standard factory bezels (that would have come on a 18348 for example)? Or, in the case of the white metal bezels on YG watches, is it just an optical illusion that the diamonds are larger?

Thank you.