F-Log and HLG don't have that much of a difference in low light, however, HLG has an edge in terms of detail preservation and finer noise pattern - HLG makes full use of 0-1024 code value, while F-log throws away 0-95 (raised black level).
NR is controlled by two NR settings, regular noise reduction and interframe noise reduction, with -4 and "off" setting there's no difference in NR between F-log and film sim/HLG.