Both. They're diffenrent genres though and yeah since Beyonce is an actress, she most likely be more remembered. It should of been P!nk vs Avril Lavigne.
I don't think we'll have the chance to forget about them 10 years from now. They'll still be around showing up everyone else who dares come against them.
If they decide to join forces, the world is doomed
Both have been consistent, but I don't think the magnitude of Pink's impact will be felt until another punk, masculine female or another gymnastic type performer hits the pop scene. Beyoncé has been praised left and right by legends, peers and the media for over a decade, and it doesn't seem like it's going to stop any time soon. Pink has too, but on a lessor scale, or so it seems.