I get the sense Lauren is getting a lot of "personality votes". She's been a decent singer in the past, but she's far less consistent than Louisa.
R&B votes are in my opinion, by definition, votes by people that specifically like their party vibe rather than people actually thinking they're the best singers.
Che isn't getting much here, and probably doesn't deserve much, but you never know when the XF audience will turn around and blindly vote for a boring white guy to win.