Kirby Dach is the safer pick, but Zegras probably has slightly higher potential in end. Dach is a good skater for his size and excellent playmaker like Zegras, just problems with consistency which isn't weird for a young player, needs to shoot more (Cough Kopitar Cough). While Zegras is a little more finesse and slightly better skater than Dach, both have really high hockey IQ's opposite of Cozens IMO and why I'm not sold on him being a top 5 pick, various videos I've watch (im not pro scout of course) seems almost like a skilled guy who's dumb. I'd be happy with either Dach or Zegras if Turcotte/Byram aren't there at 5.
With picking 5th, the Kings kind of have to lean towards the safe pick here. Dach is more likely to pan out overall at center in the NHL IMO. I see Dach as a high end center at his height, while Zegras could reach that, but maybe as a winger instead. Even then, it might be better to place your chips on the guy who's seen as a lock to reach that over hoping other guy puts it together and surpasses that.