I personally use the FF nutes in soil, and am always very pleased with the results.
With switching to aeroponics, all you would have to change...is everything, lol.
Why the switch? Are you having problems we may be able to help with?

Different nutrient companies put different micro's/metals/nutes in the mix, that may not compliment the nutes you started with. I'm guessing some can combine to create a toxic situation. But if no choice, with a good flush, a switch in nutes early in flower should be ok.
-But-
Is there any chance you can finish this grow, and switch on the next round? Especially if you haven't used the new nutes, and don't yet know the plants reactions. Tisn't impossible, but could get tricky.