At this size most of those finer nuances will only be evident in macro photos or when viewed through a loupe. And it will take more time to source antiques. So I think whatever you end up with will provide the look and feel you want, even if they are not technically technically identical to the inspo.
Of course, maybe you plan to enjoy macro photos of your ring in the future like many of us weirdos!
Totally agree with you on this. Made it clear I am just focused on them getting this made under the current timeline and communicated my preference in case the option exists.