Rega Bias 2 or Clearaudio Concept V2, MM

Which do you prefer, all other components ( amp, turntable, speakers, cables, etc) held constant ? Which one gives a fuller soundstage, tight bass that does not smother, cleaner highs without harshness, open mids that allow supporting or back row vocals or instruments to participate, better control of the low mids or upper bass -- the cello, tuba, French horn arena; all that nice stuff. I am not interested in opinions of other cartridges unless they are $300 or less, and easily obtainable.