GaGa is more versatile but Lana is best at what she is doing. If GaGa tried to do Lana, she won't be as good. She will be decent and less authentic than Lana.
Lady Gaga is technically a better singer, yes. Which in my book is more of an ability. But Lana sings with more emotion and has more confidence in her art. I go with Lana.
Lana is so effortless whereas Lady Gaga can feel so contrived.
Why is this even a question?