Britney has had a HUGE impact on the Pop world and is up there with the greats, But Xtina will forever be unmatched when it comes to her talent by Britney. This is the year where we will see who will eventually have the last laugh and I'm going for Xtina.
Unlike Britney, Xtina is very respected she recently won her 6th Grammy almost 20yrs into her career while Britney is still trying to dance and perform as if she was at a Kids choice awards and still doing the same tired moves with the Lipsync.
XTINA wins in my book.

Sorry but this is not a good indication. Britney clearly has a bigger fanbase so that's why everyone is screaming for her because her fans follow her everywhere. I mean that's good but it's different. I think people are still here for Christina's voice I mean that Jimmy Fallon video where she does the impersonations has sooo many views. I know this is kinda silly but still it shows there is a reason she might grab GP's attention! I am pretty sure the same thing would happen if she did an amazing performance somewhere. What about Britney? Her breakdown is forgotten (and that's a GOOD thing) and I only hear people talking about her once in a while only because they grew up with her music, not because of anything current stuff by her. Britney clearly has the bigger career, but she has nothing to support it anymore.

This cannot be serious.

Britney was always more famous than her

But then admittedly they have both had a massive decline, however one still has Star power behind her name and a solid fanbase and one has nothing but a voice that was once respected. Ironically enough the other is known for not singling live and having no vocals. Alas that is neither here nor there. Meaning Britney > X
Britney overshadowed X her entire career and honestly, until she has a solo hit, releases a super successful album, or manages to successfully tour to even a small capacity that isn't about to change going forward. Not when Britney is doing all these things as successfully if not more so than X.

Britney, the whole world knows it, only Christina's fans would think otherwise tbh.