'better representatives of "spoken Greek"'

J.A.L. Lee so terms P.Oxy. XVI 1874 (6th c.)  and P.Oxy. VI 903 (4th c.) in 'The sayings of the Desert Fathers: Their Evidence for Late Koine Greek', Phronema 30.1 (2015) 23-42 on p. 30n.23 and, for the latter only, p. 32.

'better' is in contrast to the records of the fifth-century Church Council debates.