I've found 2 Engineer's thumb with 5 knobs

[GrooveChampion]

Both by John, and I am confused as to which one is the right one, can someone help me out here?

[GrooveChampion]

Also, it seems that at certain settings the signal tends to distort, especially when I crank the ratio knob. Thing is I am not too familiar with compressors that have 5 knobs. Is that supposed to be like this? Cos when I fiddle with the controls even when the ration is cranked the signal clears and I do get some nice compression.

Also, I am playing on bass.