Fenris(MCU) VS Rexy(Jurassic Park)

Fenris' durability is lowered to match Rexy's. Both are fighting to eat one another and takes place in the old Jurassic Park facility. Which one is predator and which one is prey?

So Rex stomps nefed Fenris. Wolf's durability only would matter

Fenris still wins unless he stomps too hard while running and rips himself apart.