Speculated Baryonyx runs the gauntlet

If we were talking about a 1v1 fight, then the Baryonyx would more than definitely take it. However, keep in mind that volume increases faster than area (which is actually used to determine the strength of a muscle), 1.75 times larger does not equate into 1.75 times stronger, and the strength disparity between them is actually smaller. In this case, being overall more robustly built makes up for being smaller in terms of mass, as it makes the muscle area difference smaller. Although I am not implying a very relevant effect of bulk here, it should be noted that robustness can be used in a relevant argument. If we were to compare their strengths, this is what we would get, 10.5² is 1.5 times greater than 8.5², which already shows how mass does not directly equate into strength (as 3.5 would be 1.75 times greater than 2). We would have to look deeply into compared muscles, which I will try to make a diagram for later.

Also, it is important to note that the strength of two equally-sized muscles can vary depending on other factors, so I would advise not taking any results as completely factual, but as an approach based on what we know that isn't entirely speculative.

As you may already know, volume grows faster than area (since it is n*n*n, rather than n*n), meaning that mass and dimensions will not scale linearly, but instead the force that a bone can withstand will soon be lower than that applied to it, and a similar concept goes for the muscle (since the strength of a muscle is determined by the area of its cross section rather than its volume), that is the reason why human teenagers tend to eat a lot, as their body is still growing, and they need more nutrients for that same reason. An animal that is tens of times longer than it was at birth must possess thicker bones and more muscular mass proportionately, as the pressure over the bones will be greater. In this case, the Baryonyx grows by 6% dimensionally and its mass increases by 20%. Let's look at the difference in pressure from two proportionately identical specimens, but with those differences in size:

9.5²/2,500 = 27.7
10²/3,000 = 30

Which means a 10m Baryonyx would need to be 1.08 times bulkier in order to be under the same amount of pressure as the 9.5m specimen, this would equate into ~3,200kg, but keep in mind that 3,000kg is actually already rounded from the ~2,900kg result you get from scaling the 9.5m specimen isometrically to 10m. So while we don't have allometric data on spinosaurids, it seems safe to assume that it would scale in a rate in which it would be under pressures it can withstand, while not speeding its metabolism up.

No problem, I will see if I can actually make the diagram, not sure if I can do it accurately though, I'm not the best image editor.