The "ear" cover was for a SteelBook edition, anyway. As far as I know (via The Other Site), that's still the SteelBook cover. The new official cover is for the regular edition.
Ah...because this is a UHD, which likely means a new (or new-ish) 4K scan? All of the Blu-rays were done from a circa-2007 master. I doubt that that was a 4K one.
A lot really depends on the label releasing it. Reservoir Dogs is from Lionsgate, who is good for releasing catalog titles on UHD (and re-releasing them in SteelBook packaging).
Pulp Fiction and Jackie Brown (and Kill Bill, as well) are Miramax titles, which means they're with Paramount...