Looking at the price level the mini P is quite the same as the Bronco. Thomann put 175 Euros for the Bronco and 173 Euros for the mini P.
I wouldn't be surprised if the Bronco will be discontinued.
The mini P apparently has the same hardware used for the Affinity P, same bridge, same wood for the fingerboard (laurel), etc. so maybe Fender thought about reducing costs by using some of the same assembly-line used for the Affinity P.
Considering the extra short scale length, they are also going to compete with brands like Ibanez (Mikro Bass).
Most important thing I would check is the frets, on the low budget area sometimes fret filing is seriously needed.
Anyway, I am really curious to try one.