the pioneer is limited to the set frequencies thats in the head unit like 2000, 2500, 3150, 4k, 6k, 8k etc for both crossovers and EQ. Literally the dayton each mid, tweeter, subwoofer, midbass(8 pairs of rca outputs) has their own 10 band EQ which you can select any number from 20hz to 20,000hz, so if you have a harsh peak at 7447hz, you can literally choose that one along with how much the EQ cut affects the surrounding frequencies aka pin point control at that exact frequency or big general cut in the area this is what Q factor is. You have the same ability to choose any crossover point, if you want to cross your tweets at 1888 hz instead of 2000hz, voila you can. Pioneer is also limited to the type of crossovers used. Theres a big difference between bessel, linkwitz riley and butterworth that can help out in a lot of situations in tuning.
so yeah its extreme flexibility far beyond what your pioneer can do.