The two (2) are not the same. The allaah (gawd) of Islam, says very plainly that she has no son, and in fact proclaims it impossible for her to have a son. - Sura 2:116, “Who says ‘Allah has begotten a Son’?” Sura 72:3 “ ... has taken no wife, nor has He begotten any children.” See also “The Qur'an Attacks ... Christianity?”
If one honestly believes that the gawdess of Islam, allaah, and the G-d of the Christian, Allah (Arabic for G-d), are the same deity, then one should pause and give some serious reflection on the implications of one’s beliefs / claims. For to claim that the two are one, in view of Sura's 2:116 & 72:3, and Mathew 3:17 & John 5:17, is to profess - 'faith in a fickle, wholly unstable and clearly very confused deity'.
There is only one G-d, there is only one Jesus who is G-d. – Deuteronomy 6:4 and Hebrews 1:8