I've never tried the Behringer B5, but I often use a pair of Rode NT3's and find them to produce a very detailed sound.
I took the liberty of doing a bit of messing around with your sounclips. I added a little compression and then added a touch of ambience using the "Acoustic Guitar Up Close" impulse response in Perfect Space (which simulates a stereo sound) and then added a TC Electronic Cathedral reverb preset, again using Perfect Space.
Once the clips have been treated like this, the difference between the B5 and the NT3 seems to become more apparent:
www.chevinsounds.com/Music/B5.wav
www.chevinsounds.com/Music/NT3.wav
The NT3 certainly has more top end detail. Some people complain that it's a bit too bright, but it's a fairly easy matter to cut the top end if you don't like it.
Paul