There is only one Qur'an, so there is only one islam. And that Qur'an claims it's the immutable and Perfect Word of God Himself, so it is not to be changed or altered by anyone in any way, ever - and those who try, are to be murdered by the other, "real" muslims just for trying! (Sura 4:89) All muslims must by definition believe the exact same things, they are not to deviate from Muhammad's words at all, ever. Muslims who differ are either in error or hypocrites, according to the Qur'an itself. And Sharia is also no different in any different places, since it is only the set of principles and rules extrapolated from the Qur'an: islam is not "cafeteria Catholicism" it's all or nothing (Sura 2:85). There is nothing whatsoever to pretend that any form of "universalism" - where everyone will be reconciled with allah - exists in islam, which specifically & in great detail promises ETERNAL Hell for all unbelievers, & at least a temporary Paradise for the believers. NO INTERPRETATION ALLOWED!