These will be the same 4k remasters that Eureka used in the recent UK release but with different extras. No mention of original mono but it does have the HK Cut of Police Story 2 which was only in SD on the UK release.
Extra features are listed as follows –
New 4K digital restorations of Police Story and Police Story 2
Alternate 5.1 surround and English-dubbed soundtracks for both
Hong Kong–release version of Police Story 2, presented in a high-definition digital transfer for the first time
Archival interviews with Chan and actor and stuntman Benny Lai
Television program from 1964 detailing the
Chan stunt reel
Trailers
New English subtitle translations
An essay by critic Nick Pinkerton