Eastern Mediterranean Minoan Weapons Technology Found in the Upper Great Lakes Region

One of these panels is Middle Bronze Age weapons from the Eastern Mediterranean and the other from the erroneous Copper Culture. Can you tell which is which?
Both have: Mid Rib for additional strength
Rivet Holes
Tangs                                

 Why did they raise a six-ton lobe of copper from one of the ancient mines, to make bracelets and earrings? Isn't it more likely that the copper was being mined on an industrial scale to be sent back to the Eastern Mediterranean?

About 1500 B.C. at the end of the EBA the socketed weapon was developed in the Eastern Mediterranean. This was a revolutionary discovery in military terms but also greatly increased the efficiency of farming.  An invention we still use today from shovels to brooms.  At the same time, it also appears with the Copper Culture. Quite a coincidence.  It was shortly after the development of the socket that mining operations ceased at the Isle Royal copper mines. 

  After 1,500 B.C. Natives in that region reverted back to the Stone Age. A more likely answer is that the Native American never made the weapons and when the people from the Eastern Mediterranean stopped mining the copper, they took their technology with them.