You are right but how could be!? Bible was written after Jesus (saw) died and there was many different version and modifications, changes if you will. On the other hand, Kur'an was reviled and finished while Muhammad (saw) was still alive. No one heaved the right to changed or modified it. Any Prophet's sermon was regarded like message from God therefore have same importance like it is in the Kur'an.

Simple put, they can not be same, or similar, message in both Books since one Book was written by people who recorded Prophet's words and action before he died on the cross and then by they memories of him and other Book was written in order and ways how was reveled. And if you will, major difference would be that Bible was written BY people about extraordinary man and other was revealed TO the extraordinary man.

Second thing you mention is also simple... Jesus (Isa S.A.W.) and Abraham (S.A.W.), and Torah and early Bible scripts and well known and well respected people and Books. It is the SAME blood line of God's Prophets and ALL of them are loved and respected by Muslims. So it is normal that you can find elements of this or that in Kur'an (like you can find elements of Zoroastrianism in Bible). In the beginning of Kur'an is clearly said that that Kur'an and Islam is newest and final revalation of the SAME God's message. Same message that was revealed in Torah and Bible but people refused to listen and respect it.

Sorry for being this long but I just tried to explain what I tried to say with first post here.