There are currently no original texts of any books of the New Testament. The oldest fragment is the size of a credit card from the first half of the second century. The majority of complete texts start around the seventh century and NONE of them match exactly. There are differences in EVERY SINGLE COPY. Most of the differences are spelling errors but differences in actual text are also present. The famous story of the town wanting to stone the adulteress in John is not present in any early versions because it was added much later. Also the description of the trinity in John was also added in the middle ages.

(The Great Courses – The New Testament)