To begin with, Queen is a scientist who can create plagues so dangerous that may doom you the moment they touch you, as we saw in Udon. That's already a huge difference in power between them. Also, odds are he's a cyborg, ergo an extra on durability if he has metal under his skin, plus his massive body and potential awakening and better haki than any Tobi Roppo. Not to mention that Brachiosaurus was a virtually untouchable beast as an adult animal. I highty doubt this is just a matter of titles.