Hi Ralta,
On paper, having a master degree is definitely a plus over having 2 bachelor degrees. A master’s program offers you more depth and a more advanced way of thinking and managing projects. To find what suits you best you will have to take an in-depth look into the program you want to follow - if your interior design course has been of a high enough level I estimate you will have little trouble adapting to industrial design. You will just need to work extra hard and brush up on what you have missed in the bachelor’s. Go for it!