First outline what you need to learn.
From there look at the time commitment and curriculum for both aspects and see which one would fit your schedule better.
Ok, I see. But I want to know what is more useful, efficient and applicable to my case. I heard that college courses are much slower that online courses. Have you went through either approach?
I can't reply say much about your case but since you are in a a startup go with the online course as they would offer much more flexibility and you can go at your own pace since you need to ramp up learning quickly.