Said it before, will say it again but meaner: if you can say with full confidence that Islam and Christianity are basically the same or are at all alike, you are talking out of your ass.
Christianity is the following of Jesus Christ, the Messiah and only begotten Son of God, the Father. Islam outright denies the deity of Christ, the crucifixion and thus Jesus's death, burial, and resurrection, and also denies the sonship of Jesus AND the fatherhood of God.
Christianity believes in One God who is in three persons, NOT three separate deities; Christianity is not a polytheistic religion, which is what Islam claims it to be. As for the Trinity, Islam also doesn't even know what the heck that is, referring to Mary as the third part of out supposed Trinity and the angel Gabriel in place of the activity of the Holy Spirit.
And how about the morals? For ever complaint about the "cruelty" of God, and for every violation of 21st century sentiment complained about, God is ridiculously merciful. In terms of both salvation, God has freed us from the necessity of works for our eternal salvation while also setting commands for our conduct - men are called to love theirs wives like Christ loved the church, whom He died for, for example. What's more, Christianity is recognized by the New Covenant, which does away with the Old Covenant. If the concern for women is their oppression, can you point out to me their oppression? Christianity cared and cares more about women than the world does.
Islam had none of this. Islam is a works-based religion that really only benefits men. Muhammad was a warlord, a pillager, a rapist, and a killer. He took what he wanted and, as the mouthpiece for Allah, could justify his actions as "righteous". Women were not treated as equals, Muhammed himself thought they were inferior to men in both intelligence and religion, on top of the other demeaning views he had ("your women are your plowed fields" Surah 2:223).
There is SO much more to say about the matter, and I want to; this post should have Bible and Quran verses to make what I am saying easier to find, though I have no problem citing my apologetic resources, all four found on youtube:
Inspiring Philosophy
David Wood
Apostate Prophet
Testify
