I'm a big fan of both, but lately I find myself listening a lot more to LDR then F+M. Florence's vocals tend to be too overwhelming/powerful. I find LDR songs to be more soothing but not so much that they make me fall asleep.
As long as Lana can keep her steady vision going and avoid the pitfalls of celebrity excess(Gaga, Perry, etc..) she'll be fine. Maybe she'll transition into scoring films.
I like that she performs guitar + strings only as it leaves her without the crutch of percussion. She's essentially "bare" out there and is forced to come up with the goods.
Probably just going to Youtube and seeing the SNL video. Yeah I read all the Hipster Runoff B-S, but the music shines through! It doesn't matter to me if she's Lizzy Grant or Lana, either way a songstress!