Who is more true to the teachings of Mohammed Sunni or shiite?

They are both correct according to what you believe in, this is the best answer I can give!

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Both Islam schools; Shia and Sunni; are true. Both Shiites and Sunnis believe in the Same God, same God holy books, same God prophets, and same Islam main teachings ans rules. They differ on minor issues that are not critical. Refer to question below.