>>48851540They have the polar opposite flaws and development.
Hau was carefree and didn’t take shit seriously, realized it wasn’t fair to his Pokémon and shaped up.
Hop was overconfident and determined to become champion, got handed several defeats, was humbled and decided being a researcher was more his calling.
Really the only things they have in common is that they’re friendly rivals and brown. One you literally just met after moving (Hau) and don’t start out particularly close while the other is your childhood friend and is very familiar with you.