Beyoncé is a way better performer. Janet is only a good dancer, she has no vocals and only whispers during performances. Beyoncé is the full package and can literally do it all.
Janet is an excellent dancer and average singer, Beyonce is an excellent singer and very good dancer .. Not that dancing is even half as important as singing
As someone who has actually seen both live, I'm inclined to cry about this because both put on AMAZING shows. I would probably pick Janet for her intricacies which no one can match - not even her brother. If alone >>>. Beyonce is the best performer out of all of the young girls - by far.