I think data science is a very broad subject area that covers the science of organising information (information science and vlis), right through to information visualisation.
Information science would have given me a good grounding in the skills I need for my start-up (which is involved in organising research information), but I thought it would be best to build on my expertise and interests (design, HCI, UX, psychology) and team up with someone who knows a lot more about the technical side of building information systems - more than I could ever learn from a one year masters.
It sounds like we are starting at opposite ends of the data/information science spectrum; it will be interesting to see if we meet in the middle after our masters.