Sheva for me. Even though stat-wise they're both the same, I think it's a personal thing.
I find that I have more 'Sheva stories' than 'Kaka stories' to tell my kids. Perhaps Kaka left a bit too early, while when Sheva left he was the biggest personality in Milan after Maldini.
For me losing Kaka was like losing a lynchpin of the squad, losing Sheva was like losing a piece of me. Grew up with this man, shares the laughs and cries...the joy of the 2003 penalty shootout.
Somehow...Sheva also carried more emotional attachement. Kaka was just too non-fuss and business-like. When Sheva left there was turmoil just like when he came, while Kaka left just like he came, in the nicest most friendly way possible. (IMG:
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Sheva was also purchased for 25 million. There's the odd joy when you splash out money to buy someone who is hyped to be the best in the world and he proves to be it. (IMG:
style_emoticons/default/biggrin.gif) He was our answer to Real Madrid's original Ronaldo who at that time unlike CR was inarguably the best, and boy did he deliver.
However objectively I think both players are important. Stats wise they're similar too. I think the hallmark of any player's legend in a club is how sorely they're missed when they're gone. And I think both Sheva and Kaka prove they are heroes that way.
It's also probably why the legend of Rui Costa will never endure in Milan, coz we just never missed him when he retired. (By God..we do now!!)