For me it was a progress that started probably in 2011, when Katy slayed more with the end of firework's chart run + ET + LFN than Gaga did with all her singles from born this way
And ended with Roar vs Applause
In those 2 years katy kept becoming bigger with TOTGA, POM and WA
While Gaga just disappeared to tour after loosing GP support with the whole born this way era