I like the anime version a lot. ^^

There are more cards :D

I have the same oppinion with burgundyeyes.
Because there are more cards and Sakura's adventure is more interesting

more cards and better

Both. Anime versions are always the most catchy ones. More episodes, more drama, more action.
But the Anime always starts by the Manga. So mostly I would chose manga. There are differences between them.
In the manga, for example in the end, when Sakura transformed Light and Dark into Sakura Cards, Eriol and Sakura's father are both reincarnation of Clow, and in the anime, Eriol doesn't say that. So, I always checked first the mangas then the Anime.
I think manga and anime are interesting. I mean, this shouldn't be a question. If someone likes the Anime, he/she have to like the manga to. So, that's my opinion.
Manga ALWAYS have the true story, in the Anime they change a little there and here, it's always the same. In bottom, bottom, bottom of my opinion, I would chose manga. But I love Anime to, is colorful, moviment, action, effects. :3

more action i can hear sakura voice and all other voices and more action music

Hard one, i love both, but i liked the anime slightly more on this one.

Cause Meiling is in the anime! I like her~ But in the anime Shaoran doesn't return to Sakura! TAT Idk, I think I like the anime more.