There is no way a pellet has the some energy out of a 410 as there is out of a 12ga.
The pellets leaving a .410 are probably within a 100 or so fps of the pellets leaving a 12 gauge... the shot size is the same, so the weight of the individual pellets are the same. To me, it doesn't seem like 100 fps less speed would cause a noticeable difference in energy.