Thank you @
Zzz_ One of the sisters I talk to follows the Sunnah but, does not claim sufi. however, she says "True Sufi's follow the sunnah and are pious people." She also says that "there are some people who claim to be Sufi but, they have the incorrect belief and do not follow the sunnah and are not really truely Sufi and they give true Sufi's a bad reputation."
There are some who call themselves sufi, or shia but they are Muslims. Think of it like looking at different depths of water in a pool. Everyone is at a different level in their belief and faith. A hardcore sufi or shia wouldn't be considered a Muslim because they have involved themselves in matters that take you out of the fold of Islam. For example, these sufi believe that you can become one with Allah. And there are some who call themselves by these labels but aren't that deep in these beliefs so they Islam is still intact.
But in general, following these other sects will only lead to misguidance. In Islam, there is only one right path and all other are deviant, no matter how they try to justify it.
The Prophet, peace and blessings be upon him, drew a line with his hand and he said, “This is the straight path of Allah.” Then the Prophet drew lines to the right and left, and he said, “These are other paths, and there is no path among them but that a devil is upon it calling to its way.” Then the Prophet recited the verse, “Verily, this is the straight path, so follow it and do not follow other paths.” (6:153)
And that straight path, in an another narration, he said was that of one who follows the Quran and Sunnah.
i do not really understand or know what Ahlus Sunnah wa Jamaah, Al-Shia, Tassawuf, or Sufism is
Prophet

saws

said: “The Jews split into seventy-one sects, and the Christians split into seventy-two sects. My ummah will split into seventy-three sects, all of which will be in Hell except one.” It was asked, “Who are they, O Messenger of Allaah?” He said, “Those who follow the same path as I and my companions are on today.”
Among those sects in Islam are:
Ahlus Sunnah wa Jamaah (the group[jamaah] that follows the sunnah[prophetic tradition]) aka Sunni make up 85% of Muslims
Al-shia or shia is the 2nd biggest sect/denomination making up 10% of the world Muslims; rest fall into the last 5%
al-soofiyyah (Sufism)
in it's correct meaning refers to wearing woollen clothes; but normally it's referred to as "mysticism" of islam. Those who follow are it are called sufi.
Tasawwuf is used interchangeablly with sufism as a synonym but by definition most like to describe it dealing with the internal feelings and states of the heart. The term tasawwuf is not found in the Quran or the hadith (prophet's sayings), rather the word used in the Quran and hadith are ihsan.