No it's not. As I already said: The huge manuscript evidence proves the reliability of text of the Bible. You must believe that your book was faithfully preserved too and when it comes to Qu'ran, you don't have any proof for it before Uthman's time. There wasn't any good reason to corrupt the text in the early church. The earlier we go, the less we have significant variations, e.g. Comma Johanneum is a late addition and it is found in only one familiy of manuscripts. It doesen't really matter whether the number is 666 or 616 as we can identify the antichrist by Paul's second letter to Thessalonians. The reason, why I appealed to this canon is that it at least shows that the core of the canon was there as early as the second century. Some books were desputed for a long time, but the gospels and the pauline letters were there from the start. The followers of Jesus are different from prophets, because, according to Christianity, they were witnesses of the resurrection. They saw what the prophets foretold. Jesus personally tought them. I don't know where's the huge difference that makes NT unreliable.