As you pointed out, Chris, I don't know why this four hand version exists. Just from hearing I couldn't distinguish this from the original. Maybe just to expand the four hands repertoires??
I did not know this 4-hand version either. But I know the original well and noticed many small deviations in figuration and harmonisation. I don't find it an improvement on the original, and I wonder why these artists did not choose some original 4-hand repertoire.
I was not aware Brigitte Engerer had died. Very sad, at an age just half a year younger than me.