Tyrannosaurus vs Spinosaurus

This new Spinosaurus is gonna take a good beating

'It was actually highly specialised'- Taken from Scott Hartman's article called 'There's something a bit fishy with the new Spinosaurus':
'the paper by Ibrahim et al. musters a wide range of evidence from bone density, isotope data, facial innervation, osteology, etc., to suggest that Spinosaurus not only was a fish-eater (i.e. piscivorous) but was adaptive to that lifestyle to a greater degree than other known spinosaurids.'
I suppose you're correct there, I actually misinterpreted the article originally and assumed it meant that Spinoaurus had a broader horizon when it came to hunting prey when compared with other Spinosaurids'.
'Also, being larger as a predator does not necessarily equate into hunting larger prey'- I wasn't really referring to general animals but it may of came across like that. Spinosaurus already hunts relatively large prey in its aquatic diet, so there is no reason to assume it couldn't of hunted larger prey which is land-based as well.
'What competition'- this relates back to how I misinterpreted Hartman's post on how specialised Spinosaurus is, I now realise there probably wouldn't be much competition between the two large theropods as a whole.
'They really have hardly any effect on a animal of the same size'- if we are using the original Spinosaurus mode they certainly would pose much threat, they are very large proportionally and individually and would be high enough to cause decent amounts of damage to some of Carcharodontosaurus' vulnerable upper areas, eg. the neck. The curvature of the claws would of made them very useful for gripping onto flesh and tearing through once firmly enough inflicted, they were different to the typical serrated claws of most theropods, but could of still been used to combat animals other than its prey.
However if we are talking about the new Spinosaurus model, they would be rendered useless due to the height differences between the two animals.

I meant both proportionally and in absolute terms, I couldn't think of a convicing way to word it, so I said 'individually' instead. They would probably pose quite a big threat to the opponent's underside/lower back even if they moved laterally, but the areas would have to be in closer proximity to Spinosaurus' claws. But enough about that as the original model isn't relevant here.

you saying that this
a creature made to eat fish can kill this?
an monster made to fucking eat big herbivores?

t-rex on land, spinosaurus in water. nuff said

Another typical case of Spinosaurid bias, but I'm not going to dwell into why as its fairly obvious.
Anyways I agree with spinosaurus1, Tyrannosaurus wins on land due to its sheer size/height advantage, but Spinosaurus wins on water due to its superior adaptions for aquatic 

T-rex wins on land while spino wins in water.