Whereas Zacian's Crowned form has objectively superior base stats than her Hero of Many Battles form, Zamazenta has a bit of a problem. His Crowned form boosts his defense stats, but lowers his speed stat by 10 points. The devs clearly wanted him to be a wall, but he's not a very good one. Given that Rest is the only recovery move in his movepool. Steel/Fighting isn't exactly the best defensive typing either. In his HoMB form, he could be a decent physical attacker with 130 Atk and 138 Speed. Not as strong or fast as his sister, but Dauntless Shield could make his Defense a bit bulkier than her. Or should he just take the speed loss in favor of Crowned's better defenses?

Which would you say is the better form for him?
(Crowned or HoMB)