Xbox solution should be cheaper and is better cause you will be able to combine it.Because it is off the shelf, you will get multiple sizes varying in cost. That's the upside to using standard, storage solution. I know Samsung and Lexar have been working on some for a minute now. Couple this with the fact that you can use an external for additional storage, and you kinda narrow that impact.
And by the way, the Xbox’s solution don't look too much better.