I personally don't see any point comparing or contrasting K and M. They really are chalk and cheese. One a glamorous, previously outspoken and opinionated Hollywood starlet now a Duchess. The other a upper middle class, wealthy woman, who dated a prince quite young, learnt the rules and regulations and is a queen in waiting.
Both have their absolute merits, both have different figures well because quite frankly they are completely different people!
I do have a preference for K, mainly because I prefer her tailored style and I personally find her quietly confident. She can stand still and quiet but still command a presence, she seems very confident in her own right and I like that.
M, well so far her and H are still in that honeymoon stage, finding their feet, and all loved up. I find it cute. It's nice to see how happy M makes H and I do applaud her for that. M is an intelligent woman, and not the simple fawning doe everyone seems to think she is. She knows her own strength and I'm sure when challenged can be quite forthright about it. I don't like M's style as much as K. I find it more laid back and more American but that's no surprise it's where she was born and raised.
Anyhoo, I am looking forward to seeing K and W more now.