Herald of Blood corpse explosions vs. Warcaller's Bellow?

On my Thorns/Bleed Warbringer I started using Seismic Cry to consume the armor breaks, and when I got my 4th Ascendancy I chose Warcaller's Bellow, because it causes any Warcry to explode all nearby corpses for physical damage equal to 25% of the corpses' life. That seems huge.

Because I've been using Herald of Blood, I've been periodically exploding corpses of mobs that died of blood loss. So now these two corpse explosions are stepping on each other's corpses and I'm wondering, which one is better? I don't have a good read on the blood loss explosions, but 25% of the corpse life sure sounds like a lot for endgame mobs.

Anyone do the math on this or otherwise figure out which is better? Should I leave them both in place for some reason, or ditch one for the other? What do you guys think?