"There's already a monster here inside the lab...VERGO!!! His armament haki is
unstoppable!
Smoker and Law will perish! And you and every one of your friends will be dead"
Caesar thought Luffy's haki and G3 attack wasn't shit
"G-5s deadly duo is on the scene.
We're unstoppable now!". Having witnessed the Smile monster, Caesar, strawhat crew, dragons, etc the men are still truly confident in their commander Vergo making them unstoppable.
Here the smaller dragon is said to be stronger than the bigger one Zoro defeated
such that it requires Kinnemon’s strongest attack to take it down (while again he just used Homura Saki to damage Kaido)
But the very same Dragon that was wreaking havoc and being on the warpath against the strawhats (in fact wanting to eat them all) that same dragon started packing as soon as he sees Vergo