On the Masters of Science side, the Engineering degree prepares you to be a technical proficient worker bee. On the MBA side, it grooms you for management. Remember, MBA's often manage workers with higher technical degrees.
An MBA Engineer might work in managing a technical sales team, while an MS Engineer might do field service work or R&D, etc.
If I were you, I would decide what I liked to do. If you like the business side of technology, focus on an MBA. If you are more of an introvert and enjoy working on more technical projects, then go for the MS in Engineering.
I hope this helps. Also keep in mind that there are a lot of PhD's without work. If you can market and manage a business, you will always be in demand.