Since it's been a month, I doubt you are still looking for an answer, anyways:
Generally, the enemy balancing is much better in BD, so no more sudden OHKOs.
Magic is awful early on and there are, again, lots of skills that are not worth your time. This time you can reset them in exchange for money though. Also charms are so OP and money is so abundant, that every build either becomes viable or can be switched out lategame.
If your DD playthrough taught you how to exploit every broken game mechanic you could go for hard mode. If not, that may involve lots of grinding, which is easily the worst part of BD, in which case I cannot recommend it.
