If I was going to look around for someone's talent to choose as my own, I would not even spend two seconds looking in the direction of either of these women.
if i wanted to be a super succesful pop star then beyonce because of her ability to sing and dance at the same time and still sound great
but personally i have ALWAYS wanted to be amazing at piano. i took lessons for a couple of years but other things got in the way (school, figure skating, etc.) and i had to quit before i was able to get where i wanted to be.
Beyoncé's performing skills are out of this world. She cannot play an instrument or write songs only by herself, but she is THE best at what she does instead of being half good at multiple things.
I would take Gaga's talents, then pull a Sia and just write hit songs for everyone and make bank. Also Bey is really good at lip-syncing, probably the best at it.