edit: Dear gods, the Lowe is more expensive than the Bose!
the mini has a sound that is very similar to the bigger Soundlink III, although not quite as ‘clear’ – which is solved with only a small amount of EQ to tilt the response up a little bit from the midrange.
the mini is also half the weight and a lot smaller, so good for carrying around – and the battery lasts well.
Resale on the Bose will also always be higher I would guess.
None of them are super fidelity but the bass on the little Bose is plentiful but also very tuneful – it is more like a small club PA than a HiFi though so orientate the music you play through it accordingly.
Bear in mind that I normally think Bose stuff is sh1t, but I am quite happy with my little soundlink mini, and I have seen a lot of comments on the web that are similar.