>>5003733 (OP)hate to burst you bubble, but scaling theropods especially big ones like Carchs and Tyrannosaurs does work like that. Square Cube law, tl;dr bigger bones doesn't mean volumetrically larger animal. Scotty would not look all that much bigger than Sue probably just slightly longer and a bit more robustly built.
Even the biggest Carch size estimates put animals like Acro and Giga well in the same mass bracket as rex, iirc the largest giga mass estimates are like 200kg shy of Scotty which for 9 ton animals is interspecific variation territory