Manga Vs anime

Crow_Black said:
from the wiki of cardcaptor sakura.

In the manga there are only 19 cards whilst in the anime this is increased to 52, however not all cards get an episode or are explained how they were caught. The original 19 are:

The anime starts at the beginning of the story where Sakura opened the Clow Book, however, in the manga she has already caught two and how she obtained the Clow Book is shown in a flashback.

The order in which the Clow cards are captured are changed; for instance, Jump and Wood are the first two that Sakura captures in the manga, but in the anime she captures Fly. The location of the captures are sometimes changed as well.
The way some of the cards are captured are also altered.
She captures the Fly card using Windy in the anime but in the manga this doesn't work because Fly is under the Windy Card and therefore it's power is enhanced. She uses the Wood and Jump card instead.
Sakura uses the lights in the school to capture the Shadow card, where in the manga, she uses the Thunder card.
The Dream card and the Return card allow Sakura to see certain events in the anime. However, in the manga, these two cards do not exist and Sakura has prophetic dreams throughout the series.
Guardians
Cerberus returns to his original form after the capture of the Firey card in the manga. However, in the anime he needs both the Earthy and the Firey Card to do so.
Character Differences
Syaoran Li is shown to have minimal magical power in the manga but in the anime he can activate the cards that belong to him using his Sword.
In the anime, Syaoran also takes part in the Final Judgement but loses to Yue. In the manga, only Sakura does.
In the manga, Syaoran lives on his own but in the anime he lives with his housekeeper Wei and for a short while his cousin/fiancée, Meiling.
Meiling appears in the anime as Syaoran's cousin and fiancée. She does not exist in the manga.
Story line Differences
The Moon Bell, though created by Clow Reed and used to help transform Sakura's staff, had a different purpose in both stories.
In the manga, it was a way for Sakura to defeat Yue without hurting him; whilst in the anime, it was to allow Sakura another chance to try in the Final Judgment against Yue.
Kaho Mizuki told Sakura she knew about the Clow Cards before the Final Judgment in the manga. In the anime she shows up during the battle and explains her involvement.
In the manga, after Clow died, he split his soul into two parts; Eriol and Fujitaka (Sakura's father). At the end of the manga Eriol gives half his power to Fujitaka to allow Sakura to be the most powerful. Fujitaka then received the ability to see his late wife, Nadeshiko. In the anime this is never mentioned.
Sakura does not make a bear for Syaoran in the anime. She receives his bear from him at the end of the series.
Relationships
Despite knowing one another in the anime, Kaho and Eriol do not end up in a romantic relationship. In the manga they do have a romantic relationship that is noted throughout the second saga.
Rika and Terada's relationship is noted, though it plays a minimal role. In the manga, the two become engaged and Sakura sees Rika on several occasions for help concerning love, because she knew Rika is seeing an older man. The same applies for Chiharu and Yamazaki's relationship.
Syaoran is originally engaged to his cousin Meiling in the anime, but later breaks off their engagement because he falls in love with Sakura. Syaoran is not engaged in the manga.
Syaoran's feelings for Sakura progress faster in the manga than they do in the anime. By the time Sakura had captured the Firey card they started calling each other by their first name, however this happens when Sakura is changing the cards much later on in the anime.
Tomoyo's love for Sakura is downplayed in the anime compared to the manga.
Endings
In the Manga Syaoran confesses his love in Penguin Park shortly after the final battle, before telling Sakura that he will be leaving for Hong Kong. Unsure of her feelings, Sakura consults several people before making a bear for Syaoran and chasing him to the station. She confesses her love and states she will wait for him to return. In the epilogue, the two reunite two years later in high school after Syaoran finishes his duties in Hong Kong. During the two years it was noted they phoned and wrote letters to each other throughout that time.
In the anime Syaoran confesses his love to Sakura after the battle ended. After some awkward encounters, Syaoran receives a phone call from his mother who orders him to return to Hong Kong now that the cards have all been transformed. Syaoran hides this news from Sakura. However, she hears it from Tomoyo and is hurt by the news. In her room, being upset and confused over her feelings Sakura starts to cry which causes her to create the Nameless card. She chases Syaoran to the airport where he gives her the bear he had made earlier in the season. In the second movie Syaoran visits Japan four months later. Sakura tries to tell him her feelings only for the Nothing card to cause disruption and chaos. In the end Sakura admits her love (believing Syaoran to have lost his feelings for her after being absorbed by the Nothing card), but card's effect is The Nothing and the Nameless card combine and become the Hope card. Because of that, the toll has been averted and the two are united.