DC hc or STS hc for a fullY BIS retribution paladin?

Hi, it's in the title.
I heard here and there that for a fully BIS'd out Ret Pally, STS hc is best, but nearly all the BIS Rets i come across have DC hc equipped instead of STS hc.
It lead me to believe that DC hc has got to be the best trinket to equip alongside Tiny Abom hc.
I'm personally 2 pieces away from full BIS, including that trinket slot.

Any BIS Ret Pally could give me insight here, based on real numbers and experience? (not hearsay)

Thank you!