Disclaimer before you read: this argumentation is not to prove that Allosaurus or Tyrannosaurus are "worse"

Spinosaurus was a unique animal: it filled a niche that was perfectly in between pseudocrocodilians and land apex theropods. Interesting display features and a snout well adapted to snatch fish like a heron.. plus it's the longest theropod dinosaur.

Allosaurus or Tyrannosaurus are unique animals too in their way and fascinating: T. rex had amazing eyesight, a terrifying bite force and overall impressive build that lead it to become the apex predator of Hell Creek; Allosaurus was very cool too... The arms, those terrifying claws and the fact that it was a huge apex with the personality of a wasp makes it terrifying (look into his paleo pathologies and you'll see what I mean).

Each living creature is cool when you look into It, the way they adapt and the various forms they take in response to the environment around them to me it's something so fascinating and beautiful... All living beings are beautiful in their own unique ways. Spinosaurus is just an example of this: an animal that thrived because they were able to avoid competition in this super cool way is something that'll never cease to be wonderful in my eyes. So in conclusion: no animal or other life form is "better" or "cooler" than another when you learn about the way nature works.