What's better as a data scientist "precursor role": a software developer or a business analyst?

I've been offered the opportunity to transfer to my firm's IT department after I expressed interested in and demonstrated proficiency in data science (coming from a quantitative but not pure DS department). The IT department doesn't have a specific data science "role" though -- only software developer and business analyst. Given I want to eventually settle into a pure data scientist role -- and pursue a Masters in such (I'm 24) -- which of these two roles would you choose …

analyst business business analyst data data science datascience data scientist developer it department quantitative role science software software developer transfer