OOTB was her first major label release. Katy Hudson (not that Billboard counts it) was released independently. And even if you count KH, Katy still got her first US BB200 #1 with her 2nd album and Rihanna still with her seventh.
Kitties are kinda convinced she's outgrossing every Rihanna tour
But Katy's first WW tour did better than Rihs first 2 put together and she'll get a $100m tour w/ PWT and it took Rih 5 tours to get that. She's literally achieving everything Rih had going for her at a faster rate.
"I want to attribute to Eve one more reason to bite the forbidden fruit, and that would be her oral fixation," she said in an interview. "I've always felt that I've been a very oral person. It's my biggest source of pleasure."