I was under the impression that Hellcat was high performance and did not have the MDS system since any performance lifter from anyone like Melling is MDS delete.
You are correct that the HC never had MDS, so it uses 16 of the same lifters. The MDS motors, even the lowly 5.7, use 8 of those same lifters and 8 MDS lifter. My comment was specifically related to the non-MDS lifters and that buying "Hellcat lifters" is pointless as all of the non-MDS lifters are the same.
I think the 2015 lifter superseded the '14 down ones from the factory, but no idea what the aftermarket shows and if they break them down.
