Can the Biggest T-Rex kill a Spinosaurus?

Spinosaurus was larger than Tyrannosaurus, but they mostly hunted fish. Tyrannosaurus had a much greater bite force and regularly hunted large and dangerous prey like Edmontosaurus and Triceratops. They may have even lived in packs, which would give them a huge advantage. In a one on one fight, I would guess that either could kill the other, although in most combat between two species one will surrender before either die.

As a final note, Spinosaurus and Tyrannosaurus lived on separate continents millions of years apart, and thus they never would have encountered each other in life.