Katy because even though I like Gaga more, Gaga performances are kind of freaky. Swinefest Katy Perry always brings energy to the stage even if she can't sing well live.
Strange, I feel like the opposite about the SwineFest I genuinely thought it was one hell of a live show, and all around, but I guess Gaga is still quite the polarizing figure.
I chose Katy because when I went to see Gaga, I found the whole 'WE ARE A FAMILY' 'MONSTERS, PAWS UP' etc quite irritating as a casual fan and retrospectively I enjoyed Katy's concert more