Sorry not sure how I missed this lol.
Standard height, you may already know but a lot of the models came with FSD on the rear from factory from Esseesse in early 2010's onward to current models like the wifes Pista. But the 'FSD's' always had a habit of knocking / rattling internally on the early versions, they rebranded and released the 'special activs' which seem to be OK, so they appear to have fixed it, the current one is 3 years old and still OK but only done 8k miles, so time will tell. They perform really well with or without the noise, but I ended up sticking non FSD's on mine at the time as I was paranoid about the knocking coming back, and knocks and rattles really bug me!
The 500 / 595 shockers are essentially ford KA ones I believe even to this day. I honestly didn't notice any difference in comfort or ride on the FSD's or the wifes Activs vs the standard konis, but may make a bigger difference on a different setup / chassis, they were massively better than the stock fiat ones though.