A detailed side-by-side comparison of Giganotosaurus and Tyrannosaurus Rex, covering size, diet, classification, geologic period, and discovery history.
Giganotosaurus (12.5 m, ~6,800 kg) was slightly longer than T. rex (12.3 m, ~8,400 kg) but likely lighter.
T. rex had a deeper, more robust skull with a stronger bite; Giganotosaurus had a narrower, more elongated skull that could open wider.
Giganotosaurus lived 30 million years earlier in South America (Late Cretaceous); T. rex lived in North America.
T. rex had forward-facing eyes giving it excellent binocular vision; Giganotosaurus had more laterally placed eyes.
Giganotosaurus may have hunted giant sauropods like Argentinosaurus; T. rex preyed on hadrosaurs and ceratopsians.
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Did You Know? fun facts
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Did You Know?
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Both Giganotosaurus and Tyrannosaurus Rex were carnivores.
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Both dinosaurs lived during the Cretaceous Late period and may have coexisted.
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Tyrannosaurus Rex was discovered 88 years earlier, in 1905.
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Giganotosaurus belonged to Theropoda while Tyrannosaurus Rex belonged to Tyrannosauridae.
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Related comparisons
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