Carly had some haters (me) when CMM smashed. I feel like it's driven by her lack of success (compared to Katy), but also Emotion truly is better than anything Katy ever released.
Because Katy has a lot of bitter haters from certain fanbases who will use any excuse to drag her down, while Carly isn't commercially successful so she has no haters really.
Katy is a major threat, Carly is not. Also because Carly is commercially unsuccessful and Katy isn't, ATRLers think they have some air of superiority by liking her and not Katy because she's totes indie or something. idk why they act like they don't bop their bussies whenever they hear California Gurls on the radio but w/e!