If I were you, I'd stick with the SN95 because you are okay with a stiffer ride. The SN95 on a lowered vehicle will have less travel and therefore in effect feel "stiffer" and "less bouncy". The foxbody ones will allow more travel (which is why they are an option for lowered SN95 in the first place) and will then feel "more bouncy". Personal preference, both options will work.

I can only speak from my experience using the H&R Super Sport front springs with Tokico Illumina adjustables on my own SN95 ride. Liked them, never tried the foxbody ones.

Give Kevin a call at Performance Autosport, the best person to talk to over there may be "Mustang Don" as he does suspension work pretty much all day long.