We will learn more of the differences in the coming years. As Christianity has many subgroups that broke away because of differences in translation of scriptures, so does Islam; only problem being the sword.
Many passages in the Quran exhort Muslims to hate or kill or terrorize infidels (non-Muslims) wherever they find them. See Suras 2:190-193, 2:216, 2:244, 3:56, 3:142, 3:151, 4:56, 4:74 (beheading), 4:76, 4:84, 4:89, 4:91, 4:95, 4:104, 5:51, 5:32-38, 7:96-99, 8:12-15 (beheading, terrorism), 8:39, 8:57-60, 8:65-67, 9:5, 9:14, 9:20-30, 9:38-41, 9:73, 9:88, 9:111, 9:123, 17:16, 18:65-81, 21:44, 22:18-22, 25:52, 33:60-62, 47:3-4 (beheading), 47:35, 48:16-17, 48:29, 61:4, and 66:8-12. (Note: English translators of the Quran sometimes try to soften the true Arabic meaning of some of these passages. For example, to "fight" really means to kill in Arabic.) There are various versions of the Quran online so you can look these passages up.
Capital punishment is part of the Islamic teachings; and while I don't hate it, they do not justify it in a courtroom.
Though they both believe Jesus was here, some do not believe He was the Messiah.
One religion speaks of turning the other cheek. These religions are not comparable, though they are both claiming to be Abrahamic religions. One claims Isaac, while the other claims Ishmael, to be the chosen child of Abraham. The one that chooses Ishmael does not claim that type of lineage in their own leaders.