User blog comment:Kogath/Monster Hunter: World Discussion/@comment-37617547-20190912075450/@comment-5158920-20190912130354

Which makes them ties. If both monsters take damage it's a tie. Example Rathalos vs Zinogre or Barroth vs Jyuratodus.

Otherwise why make Nerg take damage at all? As I said it's deliberately showing that Nerg runs great risks.