I haven't played any of those pedals but a Ratio knob usually is no Release knob...
as a basic insight for compressors and limiters
threshold: levels over this threshold get reduced in volume attack: time it takes for the compressor to reduce the volume of levels that crossed the threshold release: time it takes for the compressor to release the signal after the volume level is lower than the threshold again. ratio: this is the strength of the compression ...usually meassured like this 4:1 6:1 12:1 etc..... limiters usually have a ratio of #8734;:1 so a limiter is nothing else than a really strong compressor really.