Congratulations on your offer, both schools are good but choosing the degree depends on your post-grad aspiration.
Most Master's students either want a specialized degree to enter into that field or gain knowledge about it. If business analysis interests you and you see yourself pursuing your career in it, you should go ahead with MScBA. However, you do have a good work experience so maybe MBA is a better option.
MBA is the most sought option for management roles, and if you want something specific go with MScBA. Maastricht has a slight overall better reputation than Tias, but nothing significant. Talk to a couple of alumni, and current students and see where they are working right now, you will get a better idea.
Good Luck.
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