If you have this dilemma, you probably aren't meant to code... Get an MBA.
But I am not a coder and have no interest in ever doing it professionally.
If you want to do code based startups, then just learn to code.
If you enjoy playing around with business models and having access to a lot of resources earlier on in your career AND you can at least tolerate corporate politics, then get an MBA.
Furthermore, don't bother with an MBA outside of the top 10 or 20 programs, They're mostly useless.
Another thing: don't expect to learn anything in an MBA program. The value of an MBA is as a credibility enhancer, a networking assist, and way to learn what areas of business you might like.