Difference between old and new LG UltraFine 5K(4K) Displays
27" Models

27MD5KL


current (as of 2020) revision updated in 2019
added: usb-c compatibility
changed: contrast - 1100:1
changed: charging - 94w
changed: thunderbolt controller: Titan Ridge (EDID id: 5b74)


27MD5KB


previous
contrast - 1200:1
charging - 85w
thunderbolt controller: Alpine Ridge (EDID id: 5b11)


27MD5KA


original version
WARNING: this model caused interference issues
sold for a short time only at Apple stores before being removed from shelves