if the reverse leakage current isn't too bad, looks like the knee curve is similar enough, just the threshold is shifted which can be compensated in the circuit design or perhaps even with just the threshold knob because you don't particularly care about the exact value of the threshold, just the resulting gain reduction. and different knees can work fine, for example SPL IRON has 6 different diode/capacitor options to choose from for slightly different sound characteristics out of the same device.