DIP means making the shoe sole by direct injection process while pouring means making the sole of the shoe by pouring process.
Desma is the name of the company that makes the DIP Machine which is super expensive and is available with a few big companies.
ISI Standard does not describe the technology that has to be used for making the shoe. It is just concerned with the test results.
THE SHOE MADE BY DIP PROCESS OR POURING PROCESS GIVES THE SAME LEVEL OF RESULTS. IT IS MAINLY THE MARKETING DONE BY BIG COMPANIES TO CREATE AN EDGE ON OTHERS.