| My opinion, like in most fights, the better, more experienced pilot would win.
Since most of the Luftwaffe's night fighter crews had more combat time than their Allied adversaries, I'd bet on the Heinkel.
However, if the P-61 was crewed by an experienced pilot/R/O, then the nod could go their way. Also, since you specified a B model that means it could have had a turret fitted, and thus the gunner could have tracked and shot at the Heinkel during the manuevering to put respective noses on each other. Advantage P-61B........... |