How does Samaritanism differ from Judaism in doctrine?

The bit I know --

The Samaritan Torah differs in insignificant grammar/ vocab changes.

From what I read, these are modernising simplifications to the language - no meanigful change.

The Samaritans only hold to the Torah (five books) but not the rest of the Tanakh (Jewish Bible).

While the Jews hold the final center of worship to be Jerusalem,

the Samaritan worship center is on mount Gerizim.

Therefore, while the Jews are currently unable to sacrifice, the Samaritans today do offer sacrifices.

It is my understanding that the Samaritans did not take converts until maybe last year and follow patrilineal descent.

If the writers of the Babylonian Talmud were correct, during the Roman period the Samaritans worshiped a bird (or perhaps used a bird as a focal image of God).

The Samaritans were a mixture of many cultures, so they obviously did not adhere to Judaism but a mix of various beliefs

A Mixed Race

The Samaritans were a racially mixed society and the Jews considered their religion a pagan system (Ezra 4:2). Their blood would become more and more mixed with Jewish blood by the intermarriage with surrounding Israelites, who saw many similarities and familiar worship that had been in former times. By the time of Christ, the Samaritans were severely despised by the Jews and to be called a "Samaritan" was to be numbered with the tax collectors and sinners.

The Samaritans were not a religion, but a people who were not taken into captivity with the Jews. Samaritans opposed the return of the Jews and the rebuilding of the Temple in Jerusalem. They were despised by the Jews.

The most you will find in the Bible about it is in John 4, with the story of the Samaritan woman at the well. Of primary disagreement was the place to worship, but also the idols which were also worshiped in Samaria. The Jews would generally not defile themselves by traveling through Samaria in order to get north the Galilee region. Read the Book of Judges, particularly its later chapters to learn what was going on in the region of Samaria/Mt. Ephraim.

Samaritans don 't acknowledge the Jerusalem Temple.

What's Samritanism. Jesus told the parable of the good Samaritan and thus implied that Samaria (if it existed) was a region that the then Jews shunned.

Agree with @Eddie. http://lmgtfy.com/?q=samaritan+judaism