FAQ requested - Can a Hospitaler Paladin take the Oath of Vengeance?

[Josiah Tramus]

Hospitaler Paladins get their channel energy class ability modified, and Oath of Vengeance Paladins replaces their channel energy class ability. Can both archetypes be stacked?

[Taenia]

No.

The hospitaler's channel energy replaces the existing channel energy ability.

Oath of Vengeance trades the existing channel energy ability for Channel Wrath.

They both replace the same ability therefore don't stack.

They both also replace the 11th level aura.

So no stacking.

[CRobledo]

APG wrote:

A character can take more than one archetype and garner additional alternate class features, but none of the alternate class features can replace or alter the same class feature from the core class as another alternate class feature.

Like Taenia said, they both modify the same class feature in some way. No stacking by RAW