I'm curious to see too! I don't know of any of these batteries, other than the (obscenely expensive) OEM Nikon one, that actually meet their capacity spec.
When selecting a battery to ship with the camera, I ordered many different versions and tested their capacity. None of them met their stated capacity, for example, the included DSTE battery that comes with the camera claims to be 3Ah or something like that, and I measured it at 2.2Ah. Far from spec, but not far behind the Nikon one, and about 1/5th the price. The DSTE battery was selected because it was readily available, had good build quality, and had one of the better capacities.