X2. Said the same thing in an earlier post. I've had and driven both. The difference is significant and I'm always a little disappointed to see builds that don't use the FF 2-piece spindles. There was a time that making the donor spindles work was the only option. No more. Find some savings somewhere and make it happen.I strongly advise you to reconsider and use the proprietary spindles from Factory Five. Much better geometry for steering axis, camber curve and bump steer. You're dumping a ton of cash into this build; don't shortcut here. If you intend to use the 6 piston PP calipers you'll have to do some fabrication for either the SN95 or FFR spindles.