I understand Industrial Design as a wider career.
Industrial Design has different branches of expertise:
- Transportation Design
- Furniture Design (as Kung Fu Jesus)
- Environmental Design
- Footwear Design
- Toy Design
- Jewelery Design
- Product Design
- POP Design
Maybe I’m missing some other one now.
My guess is that Product Design has the focus on appliances, electronics, tools, and a wide array of objects.