Katherine of Aragon was surely a sweet, loyal, strong and humble woman, but considering the education she gave to her daughter with the help of Vives, she was maybe too religious. She could fight against Henry when he chose Anne Boleyn, but she didn't, because she "had a duty as wife and queen".
Anne Boleyn instead fought against everybody who thought she was only a stupid and frivolous girl: she demostrate that a woman can change a reign and can bring the king himself to her knees. Even if everybody laughed because of her daughter (instead of the male she had promised to Henry), she demonstrate to the whole world that that daughter had the body of a woman, but the heart and the stomach of a lion.

Catherine defended the right of women to be educated and reign. The Spanish Infanta was the most cultured European princess. She was intelligent, friendly, charming, dignified, loyal, courageous, brave, tenacious, powerful, generous and stubborn. Catherine would have been a great ruling queen. She would have converted England in a feared and powerful nation. Catherine defended the validity of her marriage and the throne for her daughter against Henry and his supporters as a lioness as the powerful woman she was. But she didn' t want a civil war in England, she didn't want bloodshed. Formidable woman.

I agree with both of the above comments, but I believe Anne to be a better role model simply because she refused to back down. She defended her innocence until her last breath, and she never gave up. Before she became Queen, Anne knew what she wanted, and she knew how to get it. She was in full possession of herself, and was clever enough to use this to her advantage. They were both wonderful, strong, courageous, beautiful women, but I would rather emulate Anne.