Hereafter, it is possible to trace the process of separation from the end of the first century C.E. until the period of the Bar Kokhba Revolt (132–135 C.E.), when the tannaim outlawed the writings of the early Christians, declaring that Torah scrolls or texts with divine names copied by Christians had no sanctity. This was clearly a polemic against the Gospels, which must have been circulating in some form by now.
Textual differences? I think that there was some infusion of Christianity and normative Judaism even until the Fourth Century, perhaps even into the fifth when we read of Chrysostom ranting against Christians with Jewish leanings.
But Dr. Schiffman has some really interesting points.
Also, I believe that Christianity was not visibly noticeable until after the destruction of the Temple when the Jesus-followers pushed a new community without the Temple, something textually culminating with II Peter in the middle of the second century.
Thanks to Jim West for the link…