Dunkleosteus terrestrialis vs 'Rex-Wrecker'

[dinosauria101]

Dunkleosteus terrestrialis
In a nearly parallel universe to this one evolved an oddity; a terrestrial, quadruple placoderm with Deinonychus-level speed and agility, yet retaining its characteristic head armor and strong bite. It goes head to head with fearsome terrestrial opponents, such as lions and grizzly bears, and has never lost a fight. It's the debunking of the myth of the slow n' clunky Dunkleosteus.
However, it has one downfall; its love for AVA. And neither online forums nor Animal Face Off are enough. It needs to be one of the combatants!
Who will it fight? Will it lose? Will it win?


vs

Spinosaurus 'Rex-Wrecker' aegyptiacus
This Spinosaurus is seeking revenge; it was created in 2014 when Ibraim's proposal was widely known, yet almost nobody considered who wins in the water in Spinosaurus fights. This Spinosaurus is able to dwarf whatever it's facing 5 times over for 'revenge' on land (say against T rex, Carcharodontosaurus, etc), and can do so in water too. It has no interest in fighting ceratopsians, sauropods, or ankylosaurs as it does not need revenge, and can change its size from any weight up to 20 tons depending on the foe. Despite its thirst for revenge, it will fight many types of predators, such as large crocodiles and sharks.

[creature386]

It's always difficult to argue against the creator of both combatants involved, but in this case, I can understand your pick very well.

With its size-shifting abilities, Spino has too much of a weight advantage here.

[dinosauria101]

Yes, I agree Spinosaurus should win here due to that shape shifting.
HOWEVER, that's not to underestimate Terrestrialis. If it can just get behind the jaws and claws once and cripple a leg, it would almost certainly win - Spino would fall, which would give Terrestrialis the chance to bite the neck. Game over once that happens.