How is Sufism different from other Muslim traditions?

How is Sufism different from other Muslim traditions?

Point one Sufi is a sect, sects are not permitted in Islam. If you are changing, altering, adding to or taking away anything from the faith then its not Islam your practicing but something else....
Men and women pray mixed together, they sing etc these are not done in an Islamic mosque. Also visit tombs of saints nothing to do with Islam. There is so much that in Sufi conflicts with Islam but you get the picture.

http://en.wikipedia.org/wiki/Sufism

This tells you all about Sufi if you are interested.

It puts an emphasis on attaining a spiritual oneness with God. A lot of its teachings involve mysticism and spiritual concepts that make some Muslims see Sufism as being outwith Islam. In Kashmiri Sufism they have a belief in reincarnation which obviously Muslims in general don't accept. Paradoxically some Sufis in the middle ages were revered as great Islamic scholars and philosophers but often they were persecuted.

they are Miss-guided people ,most of them are non Muslims few are considered Muslims ,according to how much they are deviated

Hi! I don't believe any of the above answers are exactly right. Sufi's have neither changed nor altered any of Islam's teachings, they are not a specific 'sect'. Most Sufi's do not believe in re-incarnation. Sufi's are not influenced by sources outside of Islam such as Hinduism, Buddhism, Christianity, Kabalah, etc. Islamic pursuit of Knowledge and learning itself fostered the beginnings of Sufism. Anyone, male or female, of any age, any Muslim Sect, of any learning, any socioeconomic status can think and feel like a Sufi. There are stereotypes such as the Whirling Dervishes of the Mevlevi Sect in Turkey, or the Qawwaals of the shrines in Sindh and Punjab, but one doesn't have to be a certain way to be a Sufi. I believe they bring out the positive spirituality in context of Islam. Here is a link to a lecture by William Chittick which explains some origins of Sufism:
http://meti.byu.edu/mysticism_chittick.html
I hope you find this informative, and you may gain a better insight.