Iโm going to play the Drizzt card and say Queen as a character is better than Katakuri, powerwise Kata is better.
With powerscaling out of the way:
Queen was thought up as a fodder for Sanji with a relationship with Judge and Vegapunk so that we could get more lore, and motivations for Sanji, he suceeded, and even went beyond expectations with his battle for Big Mom. Katakuri was thought up as a cardboard badass, coupled with weird quirks in true Odaโs fashion, but came short, a character that had a similar motivation to Whitebeard all things considered, protecting his family, decided to stab himself, endangering his family, as seen with Brulee, only to make his fight โfairโ, yeah, that ainโt it. Oda sabotaged this character so that Luffy would face no repercussions for his recklessness.