I can't at everyone saying Taylor is local. Say that when you go to australia, NZ, philippines, SG and other south east asian countries. She isn't just huge in EUROPE. But that doesn't mean that she is just successful in US. The 9xplatinum certifications of fearless in HK and philippines says it all.
You don't know anything about Britney Spears if you're saying such thing.
At her best, she's a better performer and singer.
She can also write, compose and produce better songs than Taylor.
Now I love Britney, but the fact that you think she can compose and produce is kind of concerning. Britney is the face and selling point of her music, but she's never really been the mechanical force behind it.