Seems like we are interested or have experience in the same topics
I've played many Fodera's similarly spec'd but with seymours versus Aero's.
It's hard to identify consistent differences, and I've never seen a thread discussing this where there was any kind of agreement.
From my experience, the Seymours and Aero's in dual coil mode are very, very similar sounding. However, when switched to single coil, the Aero's are more vintage and warmer, whereas the Seymours are very aggressive and grindy.
If you are considering a Fodera, IMO, if you are a slapper at all, it would be the Seymours all the way. If not, either would be OK, but the Aero's sound a little warmer and fatter.
IME, and you should be aware that some others hear things differently here.