Black Cat and Morbius have both possessed a degree of super strength in the past. Morbius may have the slight edge in strength, but Black Cat counters with her speed advantage. In Spiderman Edge of Time, she got upgraded so that her speed was even better and her strength was enhanced as well. Given all of that, it’s hard to really see Morbius taking the win here. He’ll continue to weaken as he is deprived of his plasma. Black Cat wins.