Please don't throw things at me, but honestly, I think that Paola was more beautiful than Grace. She had the most delicate bone structure. She was an absolute knockout when she was younger. I've yet to see any royal who comes close (Charlotte Casiraghi does, but she's technically not royal).
That's the thing--I think she was more beautiful than Grace too. And certainly more beautiful than Charlotte, whom I SHOULD find lovely but who does nothing for me because she's always so damn sulky and comes across as kind of a spoiled b****.