I think this really depends on your personal interests and intended career.
Having observed a lot of friends who earned MBAs, my sense is that business school is largely built around networking. There are definitely core classes that are important (especially early in the first semester or two), but the majority of the time and energy is based around socializing, searching for jobs, building softer skills.
In contrast, I would imagine that a Masters degree in something "big data"-y, would be a lot more strictly academic and analytical.
So, depending on your personal goals, strengths, weaknesses, etc., you'd have to make that determination.
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