The difference is the infrastructure (soap/wsdl/uddi, etc), you don't have to start from scratch, tools are available, usually you don't build a system in a vacuum (there can be another services, that you want to access from your application).
posted 11 years ago
Good one for the WS forum...tossing it over.
Open Group Certified Distinguished IT Architect. Open Group Certified Master IT Architect. Sun Certified Architect (SCEA).