I'd use the set on the right. It can't hurt to use both retaining (anti rattle / pad separator) springs.
Edit
Found this:
The clips are designed to push the pad away from the rotor. This can keep the brakes cooler, reduce noise and extend the life of the pad.
I guess you need another anti-rattling spring. I know the stock 4th gen setup has 2 on each front caliper.