When this was 1st posted I listened and prefered 'B', but not primarily because it sounds better as it is (although for me it does to a limited extent), but because with some quick and dirty eq in foobar I could get 'B' sounding far closer to what I find desirable than I could with 'A'. I didn't bother posting my preference at the time but am doing so now not because my preference matters, but rather because the reason for that preference and what I take away from this is, I think, likely to be somewhat different than many others-
For me, the important concept to take away from this is that barring gross distortion, the frequency balance of a recording is the most important aspect.
A recording's frequency balance is more important than stereo imaging, dynamics, noise floor, and most everything except gross distortions or dropouts. In these raw recordings, the rolled off bass response of 'A' somewhat compensates for the boomy recording situation, where the flatter response of 'B' does not. Because frequency balance trumps everything else, that raw recording sounds somewhat more balanced. Yet if I take just a few minutes to compensate for the frequency balance problems in the recordings using EQ (in a far more controllable and fine tuned way), 'B' very quickly shows it's superiority and flexibility in producing a far better end result to my ears.
Which is best depends on a number of things: how you work, what you expect of your end result and what you are willing to do to get there. If you just want to record and not mess with the files again, and doing so inexpensively is more important than trying for the best possible result, then 'A' may be preferable. If you want to make the best sounding recording possible and are willing to make the effort to correct frequency balance issues, which in my experience can always be improved in any raw recording regardless of either the gear used or my initial assesment of the raw recording's sound quality, 'B' might be preferable.
In my case 'better' is not so much about which raw recording sounds most acceptable as is, but which can get me the closest to what I'm looking for and what motivates me to do this stuff in the first place- that near magical subjective state where I forget about gear and technical issues and simply desolve into the experience of music.