Given that Jumbos are landing on the beaches of Normandy I can see the Pershing making its appearance. At least the Jadgpanther can counter it.
Pershing is actually easier to kill than the Jumbo, and seeing as the Tiger II(P) will most definitely make an appearance, the Americans will have to get the 76 Jumbo or the Pershing to counter, and the Pershing seems more balanced, as it doesn’t bounce the normal 88 quite as much.