Probably.

In terms of what?

Will Xtina's legacy outlast Britney's? No.
Will Xtina be in the industry longer? Yes. I'm surprised Britney is even still releasing.

LMAO Christina's career is over as of right now. She could get it back from the dead, I'm sure. But, she hasn't had her own hit song in God knows how long. Britney is still quite relevant, although she too needs to get her ass together. -- Dump will.i.am and the next time she wants to release an album for her gays, she needs to not be so homophobic in her interviews for said album. -- I was a Britney stan before the mess this album brought on, and now I feel like a part of my heart is missing with nobody to stan for.

The legend already is -

2 A Great Big World & Christina Aguilera - Say Something 0.6406
51 Say Something 0.1014
Not In The Top 100 Of iTunes With Anything Britney Spears - Nothing

She already has.

Christina is already over and is just a relic.

Why is this even a thread?

She already did.

Who would've thought a few years ago though?

Brit needs this to happen - Britney Spears, & Christina Aguilera for massive a hit Britney hasn't seen since Baby, and X seen this decade more than once.

I made a thread about it in 2011 titled "Britney vs Xtina: the Next 10 Years" but it mysteriously vanished after I recently posted it in SYG.

Anyway, the answer's yes.

How Is Xtina outlasting Britney?

Solo? She hasn't
Features? She hasn't (Say Something vs. Scream & Shout).

She did

Britney Jean outperformed both Bionic and Lotus WW without a single performance. I don't think it's hard to guess the right answer

THIS! I'm still so confused. "Britney Jean's" numbers, I'm sure are horrible, but should we look at the numbers for "Bionic" and "Lotus?" Christina's dead, but Britney's on her way too if she doesn't snap out of it.