Of course

Shantungosaurus wins

Against most carnivores, but not Giganotosaurus.

It would be fairly even IMO because it could use its tail to whip

It can’t? Where do you get that from, the vertebrae on Hadrosaur tails are fused and their tails are tall and thin, not long and whip-like

Hadrosaur tails were very derived from other ornithischians and had not much flexibility. It was mostly just for balance when running.

I can see what you meant, but not every large tail is built for slapping opponents.

was it worth it

Lynx draws SUPER fast bro

Okay

Shantungosaurus fans when it realizes Giga won't conveniently stand under Shant when it rears up on its back legs to crush Giga: (it's their only defense)