I can't comment on issues with other transfers but I can state for a fact that this Blu-ray was taken from my 35mm preservation elements.
My preservation was done optically circa 1991 via wet-gate printing by John E. Allen laboratories, long recognized as one of the top labs for black and white nitrate preservation in the world. The late-1940's dupe nitrate picture negative had printed in issues as there was no wet-gate printing at the time.
I supplied my 35mm elements to Kino and they handled the transfer. Judicious use of various digital tools were utilized to clean-up the larger issues of dirt and damage on the nitrate element.
Reel three is taken from a circa 1955 16mm print as the 35mm picture element had decomposed by the time I found it.
THE DEVIL BAT will never receive a frame-by-frame 200K digital clean-up.
In short, this is the best that it will ever look.