ok, first song...I love it! Her voice sits very well with your's (or whoever else was singing). The mix was also awsome. It had a very wide stereo presence that made me feel like I was surrounded by the music. The second songs vocals weren't as articulate as the first, but still sounded good. Her voice had something about it that reminds me of how I sound when singing through an SM57 straight into my soundcard (which isn't good!). I know they didn't have much if anything added to the vocals to make them sound better, but there was still something that didn't set too well with me. I believe she has a stronger sounding voice, which with a little practice could sound very good. I can't really say which would fit the song better though. I don't think you would be going wrong with either one.