Gaga will likely open up with larger numbers, yet her longevity depends on radio support. Will the music be something that wider audiences can bite into, or will she continue to predominately cater towards her own fans and pop enthusiasts? The uncertainty of which direction she will take is a concern, and that is exactly where Katy has the edge. Lyrically, melodically and even visually, Katy tends to have a greater understanding of what consumers want and how to execute that.
Who knows what will happen, but I will certainly enjoy the show.