Full traction 6" long arm or the rubicon 5.5" long arm kit?

I like the fact that Full Traction uses a 4-link up front, and the 3-link in the back. But their kit hasn't been on the market that long....so who knows about the durability of thier rear upper joint, and I dont' know the size, or manufacturer of the heims that they are using.

Rubicon Express uses a 4-link in back, and a radius arm set up in the front, so you don't keep your caster curve. But thier kit has been around, and has proven to be a good product. I also like the cartridge joints they use, and they sell rebuild kits incase it ever wears out.