There are many differences between Joseph Smith and Prophet Muhammad peace be upon him
Joseph smith preached polytheism. Muhammad peace be upon him taught monotheism
Joseph Smith taught that Jesus was God and the son of God. Muhammad peace be upon him taught the exact opposite
Joseph smith teaches that one can become a god in the afterlife while there’s no such concept in Islam
Mormonism used to racist against black people. Muhammad peace be upon him condemned racism
Mormons don’t believe in everlasting hell and believe hell is spiritual and metaphorical. Hell is everlasting in Islam and it’s not metaphorical
The challenge of the Quran put the idol worshippers to shame and is still unmatched to this day. Joseph Smith’s work was immediately criticized
and his challenge was met pretty quickly
According to Islam revelation ends with Muhammad peace be upon him. According to Mormonism revelation still continues
Joseph Smith made false prophecies. Muhammad peace be upon him made true prophecies
Mormon women don't observe hijaab (covering for women) except a kind of wedding veil headdress in the temple. Plus Mormons can wear bathing suits in public
Mormons believe circumcision has been abrogated. Muslims don’t
The typical Mormon fasts 12 days a year while Muslims fast over 30 days a year.
Mormons have no rules for reciting scriptures such as Tajweed or Tarteel and their scriptures have no rhyming. Contrast this with the Quran
Mormons keep meticulous records of their members both living dead while Muslims have no such custom.
The LDS church is a kind of central corporation in Salt Lake City through which all meeting houses and the Mormons therein are controlled. Muslims have no such custom.
Mormons believe Jesus was crucified. Muslims don’t
https://m.youtube.com/watch?v=bpwlJL07Zxohttps://mpom.wpengine.com/2018/04/15/false-prophets-series-part-2-joseph-smith/
Another key feature is to look if there is any falsifiable claims made by them,
how did they live before/after prophethood and what did their most close people say about them also check👇:
https://www.youtube.com/watch?v=lPgy6zb0oKIhttps://www.youtube.com/watch?v=lPgy6zb0oKI
'A'isha reported:
I said: Allah's Messenger, the kahins used to tell us about things (unseen) and we found them to be true. Thereupon he said: That is a word
pertaining to truth which a jinn snatches and throws into the ear of his friend, and makes an addition of one hundred lies to it.
Source: Ṣaḥīḥ Muslim 2228 a grade: Ṣaḥīḥ
'Urwa reported from 'A'isha that she said that people asked Allah's Messenger (ﷺ) about the kahins. Allah's Messenger (ﷺ) said to them:
It is nothing (i. e. it is a mere superstition). They said: Allah's Messenger, they at times narrate to us things which we find true.
Thereupon Allah's Messenger (ﷺ) said: That is a word pertaining to truth which a jinn snatches away and then cackles into the ear of his friend as the hen does.
And then they mix in it more than one hundred lies.
Source: Ṣaḥīḥ Muslim 2228 b grade: Ṣaḥīḥ