They are really close to each other in value, assuming the yugo kept the German markings, many times they scrubbed them off and re-marked them with indigenous crests, proofs, etc.
Yugo amusers are usually re-serialized on the bolt handles and will have other scrubbed and re-numbered parts typically. RC's will keep german parts, but be mix-masters.
Condition being equal, you're looking at around $500 for either.
The best of the "refurbs" are the East Germans in the eyes of most collectors.