According to the Echo's report of the inquest, Prater said:
"A black kitten, of which I am very fond, came to my bed, and rubbed itself against my face....it tried to get into the bed, and awoke me. That must have been about half-past four, as I heard the clock chiming. I pushed the kitten away...And, just as I pushed the kitten away I heard, "Oh! Murder!" It was as if it was a nightmare. It was just "Oh! Oh! (in a faint, gasping way) - Murder!"
So Prater is very clear, she heard the cry literally immediately after she heard "the clock" (which can only be the Spitalfields clock) chime (which she thought was the chime at 4.30).
But then according to the same report of the inquest, Lewis said:
"I woke at about half-past three. I heard Spitalfields clock strike...I could not sleep. I sat awake from then until a little before four o'clock, when I heard a female voice. It was a scream."
So, even allowing for the fact that Prater might have meant 3.30 or 4.00 rather than 4.30, the two accounts are completely different because Lewis said she heard the cry before 4am, and thus BEFORE the strike of the clock at that time, whereas Prater said she heard the cry AFTER the strike of the clock.
If their evidence is accurate they cannot have heard the same cry.