i curiously recorded a little "song" with a stereo pair of Peluso CEMC6 mics, one running into a T15, and the other running into an A12. the mics were rubber-banded together...so they were not in the exact same place on each track, but i made sure that it was pretty damn close. this is not a scientific test, the method is certainly imperfect...but it's fun none-the-less.
each instrument (two acoustics, bass, electric guitar, drums, tambourine, and two "ahh" vocals) was recorded one at a time through the two pres, but at the same time...then straight into my BLA-modded 828mkII (48k, 24-bit). there was a tiny bit of EQ and reverb on a few tracks in the DAW to make it a little more pleasant, but both "songs" were processed exactly the same way.
i matched levels by ear...again, not scientific, but what are you gonna do? i didn't mean for this to be some crazy "shootout" or anything, i was just personally curious...and i figured i might as well post it in case anyone else cared.
A12:
http://www.thebrotherkite.com/stuff/a_song.wav
T15:
http://www.thebrotherkite.com/stuff/b_song.wav
* i guess i learned that when all things are common (mic, instrument, etc), these pres can sound very similar...and both quite good. man, for the money, the T15 is crazy good.