Differences between the supply chains for the retail business of Walmart and Dell.

In this opening Discussion you are to describe the differences between the supply chains for the retail business of Walmart and Dell.
Think about this: What makes two organizations a bit different? It could be what they sell? it could be where their products comes from?
Examine what your colleagues find as a “difference” with your replies asking about what they found.
Here is a source to use; but you are more than free to do an Internet search for Walmart and Dell supply chain.