A:
The SoundLink Mini is an amazing speaker for its size class. It is designed towards ultra-lite portability for mobile use. It projects sound to a smaller and more personal area than the original SoundLink mobile. While better sound quality is certainly a selling point of the larger model, we don't think you'll be disappointed by the Mini in contrast.
Many retailers carry these two speakers side by side in the store for demonstration purposes. The easiest way to understand the differences in sound quality is to listen to them for yourself.
We hope this helps!