I'm working through the volume edited by Charles Horton on P45. The essay by Martin Hengel, 'The Four Gospels and the One Gospel of Jesus Christ', is basically a summary of his book bearing the same title (London: SCM, 2000). It is an exceptionally useful distillation. One sentence that stood out was this:
'The text of the Gospels is the best-transmitted text in antiquity.' (p. 15)
I actually think that the text of some of the epistles might have been a better choice and better still might have been texts from the OT: proto-Masoretic mss from Qumran show a higher level of agreement with mss from about a millennium later.
Hengel's statement did, however, make me wonder how much scholars have actually compared the NT and Classical transmission processes from the perspective of their fidelity (rather than just observing that there are usually vastly more witnesses for the NT text).
What are the main investigations of this area?