All details of changes made to the Joker (2019) blu-ray can be found in the torrent file listing.
English and Spanish subtitles are also included in this release, as well as the DTS audio track from the blu-ray and chapter listings.
Here are some screencap comparisons for this release:
Blu-ray 1:
Regraded 1:

Blu-ray 2:

Regraded 2:

Blu-ray 3:

Regraded 3:

Blu-ray 4:

Regraded 4:

Blu-ray 5:

Regraded 5:

Blu-ray 6:

Regraded 6:

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, RefFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2 h 1 min
Bit rate mode : Variable
Bit rate : 23.4 Mb/s
Maximum bit rate : 33.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Audio
ID : 2
Format : TrueHD
Format profile : TrueHD+Atmos / TrueHD
Codec ID : A_TRUEHD
Duration : 2 h 1 min
Bit rate mode : Variable
Bit rate : 3 819 kb/s
Maximum bit rate : 7 158 kb/s
Channel(s) : Object Based / 8 channels
Channel positions : Object Based / Front: L C R, Side: L R, Back: L R, LFE
Sampling rate : / 48.0 kHz
Frame rate : 1 200.000 FPS (40 SPF)
Compression mode : Lossless
Stream size : 3.25 GiB (14%)
Language : English
Default : Yes
Forced : No