Irritator vs Lythronax

i would go with lythronax here, it has a much more formidable bite, and also has longer legs in which it would probably be just as tall as irritator.

I am not sure

We don't know its adult size, and we have no information on spinosaurid growth rate, so we should just use the immature specimen. Irritator challengeri should have a pretty formidable bite all-in-all, but Lythronax argestes simply has superior weaponry.

Lythronax wins