Which one is better suited for 05-06 non sport sedan?

I know that the revised ones just have a higher rear spring rate, but which one is actually better?

Depends on what you are looking for?

Better is an opinion.

I would go with the higher rate but if you want a softer ride, go with the soft one...

I went with the unrevised for mine, but I have the sport sedan. I replace the springs in the front, kept my stock struts on the front, but replaced the strut/spring on the rear. It definitely made the ride softer, but the stock sport spring is very firm anyway. It dropped it about 1" in front and 1 1/4" in the rear, give or take.

If anyone needs some "Z" springs, I have some for sale on My350z, pm me for details... They are off of a 2007 350z...

Thanks...