Question: how are sikhism and islam different?
Answer: Sikhism was founded in the 15th century CE by Guru Nanak and the Guru Granth Sahib is the scripture followed by Sikhs as "The Living Guru". In Islam, the legal system based on the Quran and the Sunnah is known as Sharia; there is no such legal system mentioned in Guru Granth Sahib.