Not aware of any current Harrah's status match programs.
But, you can always do DIAD (Diamond in a day) which requires you earn 3,000 Tier (Base) Points in one casino day to qualify for Diamond, instead of the usual 11,000 Tier.
IIRC, there have been some past status match programs in AC @ Harrah's --- though, I can't recall the details. (Trump has also been known to have a status-match program)
I also have to assume that very few [earned] Black Card holders would want to move their play to Harrah's anyway.


F&B @ Borgata beats much of what you will get at Harrah's properties in Atlantic City; and the Borgata lounge beats the Harrah's Diamond Lounges [in Atlantic City].