Engineering Technician is an Associate Degree (2 years). Engineer is a Bachelor's Degree (4-years). Engineers make much more money and engage in more challenging and appealing work, though the technician's work does involve the development of technical skills to a very refined level. It's a matter of how long you want to stay in college.
Weird things happen when machinery is rotating has very high(turbo) speeds but both are similar but rotating equipment would probably be the foundation to turbo machinery.
A turbo-machinery engineer would be a specialty within the rotating equipment engineering category.
