Other than the Panther being made by Grumman and the Banshee by McDonnell, the Panther is shorter in length, and wing span - it's a bit beefer looking than the more slender Banshee.
The Banshee seems to have been overshadowed by the Panther as a Navy Fighter from the Korean War era, even though all counts point to it being every bit as good as the Panther. Maybe in part because McDonnell was a relatively new aircraft manufacturer and Grumman was already well known for it's previous 'cats', the Wildcat and Hellcat. Also, the Panther got to be featured in a motion picture ('The Bridges at Toko Ri').
Well, maybe I should do it and take my time since it is a rather rare bird compared to what else is being done. So make my primary the Banshee.