Difference between old and new LG UltraFine 5K(4K) Displays The Apple Store shows the LG UltraFine 5K Display and LG UltraFine 4K display marked as "new". 

I have found reviews on YouTube of the same two displays dated 2 years ago.

Does this mean that there are both an old and new version of the displays with the same names?

If so, what is the difference between the old and the new versions?
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