I've probably said this 30 times, so apologies if it's boring now, but;-
My Gt astounds me every time I drive it, such is the level of comfort and solidity. It's very likely i wouldn't have kept it if the ride wasn't so good.
I know alignment and tyre choice are essential. Pirelli PZero Rosso's would shake the phone off it's holder, even on the A1.
I have B4's on my 159, they're fine, but I never think WOW like I do in the GT.
Obviously I can't comment how the FSD's would be with standard springs, but they ought to work better at higher ride heights.
GT 3.2 V6 - Q2, KONI FSD & EIBACH PROKIT, GTA REMAP, MICHELLIN PS3's, BMC CDA
159 SW 2.4JTDM TI - ALFATUNED, WIZARD BACK BOXES, KW V3 COILOVERS, NOKIAN WR A3/MICHELLIN PS3, PCA DYNAMICS ALIGNMENT.