Yeah, but it's still a bit weid. The Baker material is Barclay material, some Barclay material was part of the series, even one of the Baker albums was... it's just not the same reissue crew, I assume?
I did not see any producers credit on the Chet box. The name of critic Alain Tercinet is mentioned in the back liner notes and he was involved with the Jazz in Paris series.
Since the box and the series come from Universalmusic France I'ld say the same people were involved!