Which is the real advantage of setting the minimum difficulty? Will it result in a lower rejected proof of works? Will it lower also the accepted proofs of works because of their higher difficulty? That's a thing that I never worried about but I'm wondering if should I be setting something to have better performance in some ways.
Thanks in advance to anyone that will explain me that.
It has no effect on performance, only the feedback you receive from the pool e.g. your hash rate.
I see, thanks for the info Mikestang.