Originally, the mini humbuckers were only to be found in the Gibson Les Paul Deluxe. The narrower magnetic field produces a clear and compact sound compared to normal humbuckers. In the 1970s, these pickups were often replaced by stronger pickups (often with significantly unpleasent frequency range) - today, where gain and sustain are no longer a big issue due to modern amps and pedals, the great sound of these pickups is however appreciated once more.
The model for the bridge position has a little more output and brings incredibly strong riffs and assertive leadlines to the sense of hearing.