Distributed fulfillment moves inventory and shipping capacity closer to several demand regions; centralized fulfillment concentrates them in one primary location or a small hub set. That architectural choice changes more than parcel distance. It changes how much inventory must be duplicated, how orders are routed, how labor and systems are coordinated, and where disruption risk accumulates.
A distributed network can shorten many delivery paths and provide alternative nodes, but it also replaces a simple source decision with a continuous allocation problem. A centralized model gains inventory pooling and process consistency while accepting longer routes and concentration risk. The real difference is the network logic connecting placement, capacity, promises, and total cost.