Can I transfer UV seams between objects? I have a couple of objects. They have the same geometry (duplicates), but different scales.

Can I transfer the UV seams between them? Linking them via UV's results in a stretched texture. 

I know the obvious solution was to mark the seams before doing the duplicates, but that milk has spilled.
Data Transfer modifier to the rescue:



In your case, the mapping sounds as if it should be via Topology