Ariana vs Katy: More successful in the next three eras?
Both have had three major eras, and it is obvious that Katy has been more successful:
Yours Truly vs One of the Boys
My Everything vs Teenage Dream (including The Complete Confection)
Dangerous Woman vs Prism
Will Katy's next three eras still be more successful than Ariana's?
KP4 vs AG4
KP5 vs AG5
KP6 vs AG6
Katy's going to slow down as she's not AS big of a streaming artist as Ariana. Katy started in the digital era, reached a massive peak in the YouTube era, and slumped very slightly at the end of the YouTube era and the beginning of the Spotify era. While it's hard to know how much streaming power she will have, looking at her peers it doesn't look like she will have much. Rihanna is the exception, and she ironically has a massive advantage by being an urban/pop artist rather than just a pop artist (streaming leans heavily in favor of urban).