Christianity has around 2 billion followers and they believe in God and their holy book name is bible. The founder is Jesus Christ and the leaderships are by priests, ministers, monks, and nuns. The basic main belief is that there is only one God, who watches his creations. Jesus Christ was the son of God and he died to save humanity.
Islam has 1.2 billion followers and they believe in one creator as God(Allah). The founder is Muhammad and their holly book is Quran. leaderships happens by the Ulama, Akhond, the imam, and the religious scholars. the Islam basic believes are that the person salvation occur by following the five Pillars. The Pillars are: faith, prayers,