T'Challa is both equally King of Wakanda, using an active purpose in his country's affairs, and Black Panther, the Wakandan people's protector. T'Challa has skilled all his lifetime to be the Black Panther, but Erik is an knowledgeable elite particular ops commando. The trailers do expose he obtains his personal model of the Black Panther accommodate at some position. He has no these lineage in the comics, which was a plot position.