This thread mentions that the LR2170LH perform better than the P45B at higher currents. Seeing as Mooch hasn’t tested the P45B higher than 40A then it’s very possible the Lishen is better at 50-60A.
EDIT: Didn’t realise that the mentioned flashlight wasn’t some high current monster, so the most likely cause is quite possibly getting a cell with lower resistance than Mooch’s samples.
I just reviewed the Nightwatch NS14R V2 and measured just over 60A on turbo from a single cell.