Guitar Mic vs Guitar Mic B

What's the difference between your two mics for acoustic guitar?
They sound the same, but they have different powering and connections:

Guitar Mic:

  • Temporary mounting on a sound hole or f-hole
  • Phantom powered
  • XLR connector
  • Connects to a sound-system mixer or to an instrument amp that has phantom power
  • Also connects to any phantom power supply, which connects to an instrument amp that lacks phantom power

Guitar Mic B:

  • Temporary mounting on a sound hole or f-hole
  • Battery powered. Battery box lies on the floor.
  • 1/4" phone jack connector
  • Connects by a guitar cord to an active direct box, instrument amp, or effects pedals