I believe that the Blue Train stereo/mono is an EU loophole pirated disc. I just wish people will stop buying these bootlegs. What is the point?
Some people don't know, the majority of people have no idea about mastering and different source provenance and analogue only vs digital pressings and so on. It's not strictly a bootleg or a loophole either, just a pressing of out of copyright material in certain areas where the copyright has expired and cannot be resumed, just because blue note has access to the source does not give them legal claim on the material anymore in those areas where copyright expiration has happened so their copy is now legit as anyone else's.
Just better, and better art and better access to mastering budget and talent which makes it worth buying I doubt anyone with a name would want to remaster from CD sourced material.
People just need to keep their eyes open, that's all. I picked up a DOL Mingus Blues and Roots expecting the worst, it's not bad, not great either but it's not hell to listen to... would rather get one closer to the source and will probably avoid the DOL Sonny Rollins Riverside releases like Bridge and Saxophone Colossus.