Generally speaking, SII is the easiest mechanism which can be used to INVOKE operations on a CORBA object. All applications which use SII could be IMPLEMENTED with DII. Not all applications which use DII can be implemented with SII. If an application can be developed with SII then it probably should be. This is because DEVELOPING code with SII requires less code and is much more straight forward. The language compiler can be used to validate types and optimize code. There are certain conditions which make DII a better alternative.

Generally speaking, SII is the easiest mechanism which can be used to invoke operations on a CORBA object. All applications which use SII could be implemented with DII. Not all applications which use DII can be implemented with SII. If an application can be developed with SII then it probably should be. This is because developing code with SII requires less code and is much more straight forward. The language compiler can be used to validate types and optimize code. There are certain conditions which make DII a better alternative.