Mod health or protection stat?

First of all loving double drops.

I've just simmed a 5 dot health mod with a 5.88% health primary stat and +9 defence, +4 speed, +309 health & .86% defence when maxed.

I have a 3 dot health mod currently on RG with 15.5% protection as a primary stat, +.52% health, +1.2% tenacity, +.33% offence & +1.3% defence when maxed.

I'd appreciate a bit of advice. Which mod would you assign to RG and why?

Thanks.