it's the 19 better than 21? she has an awesome voice, but as far instrumental part goes, i got disappointed from what i read in reviews
21 is far more professional on a music level, yet I like the simplicity of 19 the most, you know, just a guitar and her, you still get awesome compositions like cold shoulder and tired. When she wrote 19 she was heart broken by some dude, so you can notice the melancholy vibe, 21 sounds more enthusiastic
and instead of reading reviews listen to the album and see if you like it or not, reviews are usually not neutral and obviously, personal opinions.