The second nimcha is simply a different sword type altogether, although they are related. The first is from Morocco or Algeria and the other is from Zanzibar or Oman. The peen block represents a turtle. That type of blade is a typical style for the Arabian peninsula. I have one with a straight blade and it's one of my favorite swords to hold. That grip is super comfortable with my leather glove on.
that early modern Chinese short sword is very similar to the Artillery swords / Cabbage chopper . . . . of Europe at the same time probably has a European made blade as well