Though neither men brings geographic plusses to areas Trump is likely to already win.
My bet is that it will be Kristi Noem. Female. Governor. Right Age given that Trump will probably die in office if elected. Also been non-critical of Trump. And she's beautiful - Trump is shallow that way. And given that populism continues to reshape the parties of the West, the fact that she is not "elite" and didnt go to an Ivy will play well. And lastly - Upper Midwest area and that will play well in the area for that regions continued realignment to the Republican party.