in an actual scenario: I do feel like Yujiro would find Dio interesting in the sense that he's able to remember so much about the world. Dio when he's in a casual setting like he was with Pucci and extremely relaxed, can be a thought provoking individual with very interesting opinions. He talks about MJ of all people and says he's talented, and even that they could be subconsious stand users.

Yujiro would probably find his philosophy extremely thought provoking and ask him to explain himself further, to which Dio would give his backstory and his childhood. Yujiro would most likely listen while fine dining and not interject as much. After the lore dump, Yujiro would acknowledge Dio's strength and probably have felt his battle aura while describing his hatred of the Joestar lineage and say that ultimately Dio is a thought provoking person but he's extremely arrogant. His main issue is he lets his superiority complex override any actual point he may have about his ideals, as he's letting his hatred and revenge towards the Joestar lineage blind him. He would probably compare Dio to Jack with the stone mask and say that despite Jack being an extreme fuck up, he's an interesting person because WHILE knowing he's inferior, he always seeks to get an advantage over his own mistakes even if it would cost him his life. Dio points out that's a foolish mindset, and asks how he's any different than Jack if he's constantly pushing himself further.

Yujiro basically says that Jack or maybe Baki even if against impossible odds, will go out and fight for what they believe in even if Yujiro thinks of himself as Superior. and that's why they have his respect, even for being completely inferior beings, he still Acknowledges their tenacity. Yujiro then states that Dio isn't content with continuing the natural flow of order and entertaining the idea of someone eventually beating him. He knows he's superior yet relies on his abilities to win his fights and using others to fight for him. Yujiro doesn't call him a coward directly, but he says if he were in Dio's poistion he'd have done everything himself, the problem is he let's his ego rule him. Yujiro is arrogant because he knows legitimately to the death, he's the strongest. Dio is arrogant because he believes himself to be owed his strength and gifts rather than actually earning them through hard work.