Sammael(Hound of Resurrection) vs Angel Dust

Both very strong and durable.

Angel Dust beats its ass

Sammael, If we're counting its abilities.

Which ability? Healing or birthing more when it is killed?

Both of those mentioned.

Healing won't save it. Hellboy was killing multiple Hounds with brute strength in their final battle. Making more won't help here since there isn't a mountain of eggs like there were at the end of Hellboy