Getting an MBA from a small or online program is not usually used to switch careers or get a big boost. It's normally used to simply get more education and meet thresholds for promotions at your current employer.
The MST would likely be more helpful for a technical role, while the MBA would likely be more helpful for a manager role.
Strategy Discussion Thread | Strategy Master | GMAT Debrief| Please discuss strategies in discussion thread. Master thread will be updated accordingly. | GC Member Write Ups
GMAT Club Premium Membership - big benefits and savings