What are the differences between the Compressor MKII and Bass Compressor?

The Compressor MKII has a tilt style Eq knob and a switch for setting the cutoff frequency of the Sidechain Highpass Filter (off, 120Hz, or 240Hz).

The Bass Compressor has a knob to set the cutoff frequency of the Sidechain Highpass Filter (20Hz - 400Hz) and a Tone + Color switch which adds mild harmonic distortion with a mid range cut or an upper mid range boost (sounds great on everything, including guitar).