Size comparison

These two seem to be the same size

This is an obvious curb stomp for Chasmo. Also size is more about wieght and less about length or height. Example can be the Lion-mane jellyfish and it was so much longer than the Blue whale but the Blue whale was thousands of kilograms larger, so Chasmosaurus may have been towered over by Dilophosaurus but Dilophosaurus was so much lighter then Chasmosaurus so Dilophosaurus is kinda screwed, prehistoric nature's rule, not mine.

Double cheeseburger

Bad dilo skeletal

One headbutt and youll see Dilos soul floating away. Chasmo literally fought Daspletosaurus and Gorgosaurus

^ absolute common, based, gigachad Lambo W. Chasmosaurus dealt with way worse, like how Sinoceratops dealt with the larger Zhuchengtyrannus and how Styracosaurus dealt with Albertosaurus, Chasmosaurus literally turns Dilo's soul into nothing but a pile of mush.

Based deltadromeus

Chasmo moves on