WDR and IQ at low light

[tuil]

I am choosing between DS-2CD2387G2H-LIU and DS-2CD2386G2H-IU cameras. I am not going to use white light, only IR. Both these cameras have the same image sensor size (1/1.8") and the same lens (F1.0), but one has 130 WDR and other only 120. Do they both perform the same at low light and absolute darkness or is one better? AI suggests that DarkFighter camera, the one with 120 WDR, should produce cleaner, sharper image compared to Hybrid ColorVu when IR is on – is that correct?