How big can animals get?

Feb 13, 2023
"The largest animal ever to walk on Earth was likely the dinosaur Argentinosaurus, a hulking 77-ton (70 metric tons) titanosaur that lived about 90 million years ago during the Late Cretaceous. "

""The largest animals in the fossil record are just under 100 tons [90 metric tons], which supports this theoretical maximum,"

This is confusing. Which is it - 77 or 100 ton ?