The full sized will be better... but if you are in cities a lot, the smaller BS is easier in traffic and easier to park. That's really the only real advantages to it. The fuel economy is about the same.
But for snow, light off road, and the beach the BS will be fine. Might be a little better in the sand since it's lighter. Just make sure to air down to lengthen the tread and have a compressor to air back up after. I've spent a lot of time doing all that in a Forester, and the clutch lockers on the Badlands with sasquatch will help a lot in specific situations.