Interesting comparison Muj. +T.
For me, it's a toss up between files 1 and 2. Both sound just a bit smoother than 3 and 4 to my ears. In the latter two I heard some harshness on her highest notes. Tonally though, the mics seemed quite similar to me.
Wow, apparently my ears weren't awake yet when I listened. 1 doesn't sound nearly as good as 2 does to me now, 3 sounds much better than it did to me earlier, and 4 sounds really good. It would go 4, 2, 3, 1 for me now. I guess the decongestant hadn't kicked yet when I first listened.