Which dorothy is better?

Anime Dorothy, hands down. I think the anime Dorothy's eyes are a work of art in themselves. Also, manga Dorothy spends too much time standing around looking drugged or clueless. Anime Dorothy has tremendous poise -- it's one of her best features.

I prefer the animated Dorothy over the manga - and that only rarely happens. Generally a yield to the principle that, whether it's relation to the series is, that the manga will be better than the anime.

That just doesn't happen with shows like Big O and Evangelion.

From what I've seen of the manga (which isn't much I don't own any) Dorothy seems much more consistent, plus you can see her eyes properly.