Both are the same. However, Udyog Aadhaar's MSME must register for Udyog Aadhaar. Any organisation, not just MSME, can register for Udyog Aadhaar. It is a unique identifying system provided by the government to SMEs. There are numerous government initiatives available to small and medium-sized businesses. However, not all businesses can make use of them. It is easily accessible to those who have registered for Udyog Udyog Aadhaar.