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Well, considering a polar bear spends a considerable amount of time on land, I'd count Spinosaurus as a semiaquatic dinosaur, along with Koreaceratops.
In my definition, a marine creature is a creature dependent on a body of water to provide food and a good life. Technically, Spinosaurus would be at least semiaquatic.
Nice post RexFan!
Torvo wouldn't have been able to effectvely use it's arms in face-to-face combat because of their position, if it would've changed into a position in which they were as far out as his jaws it'd have to take a pose similar to the vertical-tail dragging reconstructions from the past, but those reconstructions are not really what one would call "exact". Torvo's arms would've been exceptionally effective against opponents not as high as itself, but not on something of similar or even greater height.
It's quite easy to see when you compare their necks.
I cannot find tooth lengths of any one of these dinosaurs for the life of me, but the teeth were a bit longer, but not as wide and robust, however, I can't tell you the excat difference because there isn't a single study which mentions the length/width of their teeth in the entirety of the interwebz. You should also keep in mind that often times the exhibits at museums will have their teeth partially pulled out of their sockets, making them stick out more than they did in real life.
Agility was probably one of the biggest advantages that Torvosaurus had over Tarbosaurus.
I know that practically all (some rare exceptions do exist) predators have binocular vision, but as you have pointed out yourself, the binocular vision of Tarbosaurus was far more capable than the binocular vision of Torvosaurus.
Since all of the most important muscles used for generating pressure with a bite are located in the back of the skull and the neck, it does seem very likely that Tarbosaurus had a greater bite force than Torvosaurus.
Tarbosaurus bataar
T. bataar, being a tyrannosaurine, was one of the most advanced theropod species, only inferior to Troodontids and Dromaeosaurids in mental capacity and second only to the most terrifying dinosaur known, Tyrannosaurus rex (as well as a few Carcharodontosaurs and Spinosaurs and perhaps Zhuchengtyrannus). Since it was a tyrannosaurine and lived during the last few million years before the KT extinction, it's safe to assume that it's mental capacity was well beyond a Megalosaurid (which, when compared to coelurosaurids, were quite lacking in that area to say the least) which lived almost 100 million years before T.bataar ever came to be.
As we can see in that picture Tarbosaurus had exceptionally great binocular vision.
Torvosaurus on the other hand, had next to no binocular vision at all (not a big surprise seeing as how almost every Carnosaurid had pretty bad binocular vision) as we can observe in the following frontal picture of a Torvosaurus skull.
Tarbosaurus probably had a more powerful bite, going from their jaw length and depth, however, I cannot find a study with definitive calculations of Tarbosaurus' bite force for the life of me, so yeah...
Tarbosaurus and Torvosauurs were both similarly long and high, however, there is a huge difference in robusticity when you compare their skeletons:
(Keep in mind that both are at the same height and length) Since most of an animals weight is located in it's rib cage, we should compare that first. In width they are about the same, but the Tarbosaurus' ribs are a good bit longer, so this area is pretty equal with a very slight advantage for the Tarbosaurus. There is however something that is even more important in the estimation of weight and that is the spinal cord. The spinal cord has to carry next to all of an animals weight so an animal with a more robust spinal cord would be heavier and when comparing the spinal cord of this Tarbosaurus with the spinal cord of this Torvosaurus, you can see a clear difference, with the Tarbosaurus' vertebrae being a lot thicker and just more robust in general.
As for arms, I want to say that if you look at the Torvosaurus specimen I presented above you'll notice that it's arms, even though they were very impressive, couldn't have done anything to stop a Tarbosaurus from nomming it's face, since Torvosaurus had a horizontal posture, meaning that it's arms wouldn't have been capable of repelling a frontal attack directed at it's snout.
