IIRC, there was a reddit post in which Mooch said that the Ampking/5-leg iJoy 20700s and several others were in fact all re-wraps of an OEM Mollicel 20700, which he also tested, and rated them all very well and within 2% variance of each other...Honestly, I prefer the Ampking 20700 cells. They're the same as the iJoy 20700 5-leg cells in a different, slightly thicker wrapper, AND they ship with a silicone case.
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I have just one of the iJoy 5-leg 20700s that I got when I bought the Pulse BF because I was not sure about the 'new to me' battery form factor, but compared to nearly any of my 18650s in the battery adapter, on the Pulse BF with a 0.25 Ohm build of 24g SS 5 wraps on 3mm ID, I get nearly double the battery life (measured in refills of the squonk bottle) compared to an 18650.
That cel, in whatever wrapper seems like a solid performer to me.