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lestatdark said:

Edit - Actually, the Spinosaur is considered to be the largest predator in the Cretaceous, with over 15 M long and weighed between 7-9 tonnes, which also puts it's mass above the T-rex's which weighed between 4-7. Who'd win in a fight? Probably the one who could adapt to the situation faster, but the Spinosaur would have a large size advantage already.

I suppose this is true

Still, the shape of the Spinosaur skull suggests that it wasn't something that attacked large prey - it probably wasn't adapted to kill somethingn roughly its own size